diff --git a/2d/palette.c b/2d/palette.c
index 103dd58d9..5f0abf6c0 100644
--- a/2d/palette.c
+++ b/2d/palette.c
@@ -68,6 +68,7 @@ void gr_use_palette_table( char * filename )
 
 	fsize	= PHYSFS_fileLength( fp );
 	Assert( fsize == 9472 );
+	(void)fsize;
 	PHYSFS_read( fp, gr_palette, 256*3, 1 );
 	PHYSFS_read( fp, gr_fade_table, 256*34, 1 );
 	PHYSFS_close(fp);
diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index e2c860db7..7423566ab 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,5 +1,9 @@
 D1X-Rebirth Changelog
 
+20110927
+--------
+2d/palette.c, RELEASE-NOTES.txt, editor/eobject.c, editor/group.c, editor/meddraw.c, editor/medrobot.c, editor/mine.c, editor/segment.c, editor/seguvs.c, iff/iff.c, main/aipath.c, main/bmread.c, main/dumpmine.c, main/fvi.c, main/gamemine.c, main/gamesave.c, main/gauges.c, main/newdemo.c, main/newmenu.c, main/piggy.c, main/render.c, main/titles.c, texmap/ntmap.c, texmap/scanline.c, ui/button.c, ui/inputbox.c, ui/keypad.c, ui/keytrap.c, ui/popup.c, ui/scroll.c: Fixed set but unused variables
+
 20110926
 --------
 main/fireball.c, main/lighting.c: Code consistency checks by _Tyr_; Fixed set but unused variables
diff --git a/RELEASE-NOTES.txt b/RELEASE-NOTES.txt
index 90acb3db6..7e07e635d 100644
--- a/RELEASE-NOTES.txt
+++ b/RELEASE-NOTES.txt
@@ -40,9 +40,6 @@ Special notes for this release
 * Compiling the source via SCons will now automatically check for Endianess
 * Available SConstruct options have changed! See 'scons -h' for more information.
 * On *NIX (Linux, BSD, etc.) the game binary will be called 'd1/2x-rebirth' and on Windows the executable is called 'd1/2x-rebirth.exe'. No -gl or -sdl suffixes anymore. If needed, correct your Desktop shortcuts, start scripts, etc.
-* If you use GCC 4.6 you might encounter many warnings looking like this:
-  'warning: variable ‘VARIABLE_NAME’ set but not used [-Wunused-but-set-variable]'
-  Note that these warnings are totally harmless and we will fix them as soon as possible.
 * The Tracker server is brand new and might still have a bug or two. If you encounter a bug, let us know so we can properly fix it. Most can be fixed without a modification on the game itself.
 
 
diff --git a/editor/eobject.c b/editor/eobject.c
index 569fc5943..07624614c 100644
--- a/editor/eobject.c
+++ b/editor/eobject.c
@@ -845,7 +845,6 @@ void move_object_to_position(int objnum, vms_vector *newpos)
 			fvi_query fq;
 			fvi_info	hit_info;
 			vms_vector	last_outside_pos;
-			vms_vector	last_inside_pos;
 
 			temp_viewer_obj = *Viewer;
 			viewer_segnum = find_object_seg(&temp_viewer_obj);
@@ -877,8 +876,6 @@ void move_object_to_position(int objnum, vms_vector *newpos)
 
 					vms_vector	temp_vec;
 
-					last_inside_pos = temp_viewer_obj.pos;
-
 					vm_vec_avg(&temp_vec, &temp_viewer_obj.pos, &last_outside_pos);
 					temp_viewer_obj.pos = temp_vec;
 					update_object_seg(&temp_viewer_obj);
diff --git a/editor/group.c b/editor/group.c
index af0a62eeb..5d3f3aecf 100644
--- a/editor/group.c
+++ b/editor/group.c
@@ -444,15 +444,11 @@ void duplicate_group(sbyte *vertex_ids, short *segment_ids, int num_segments)
 	int	v,s,ss,new_vertex_id,new_segment_id,sidenum;
 	short	new_segment_ids[MAX_SEGMENTS];
 	int	new_vertex_ids[MAX_VERTICES];		// If new_vertex_ids[v] != -1, then vertex v has been remapped to new_vertex_ids[v]
-	short	new_object_ids[MAX_OBJECTS];
 
 	//	duplicate vertices
 	for (v=0; v<MXV; v++)
 		new_vertex_ids[v] = -1;
 
-	for (v=0; v<MAX_OBJECTS; v++)
-		new_object_ids[v] = -1;
-
 	//	duplicate vertices
 	for (v=0; v<=Highest_vertex_index; v++) {
 		if (vertex_ids[v]) {
@@ -473,6 +469,7 @@ void duplicate_group(sbyte *vertex_ids, short *segment_ids, int num_segments)
 			if (Objects[objnum].type != OBJ_PLAYER) {
 				int new_obj_id;
 				new_obj_id = obj_create_copy(objnum, &Objects[objnum].pos, new_segment_id);
+				(void)new_obj_id; // FIXME!
 			}
 			objnum = Objects[objnum].next;
 		}
diff --git a/editor/meddraw.c b/editor/meddraw.c
index 5df564643..f947e2d52 100644
--- a/editor/meddraw.c
+++ b/editor/meddraw.c
@@ -495,14 +495,9 @@ void draw_special_wall( segment *seg, int side )
 	draw_wall_side(seg,side);
 
 	if (Walls[seg->sides[side].wall_num].trigger != -1) {
-		int trigger_num;
-
-		trigger_num = Walls[seg->sides[side].wall_num].trigger;
-
 		gr_setcolor(TRIGGER_COLOR);
 		draw_trigger_side(seg,side);
-		}
-
+	}
 
 	gr_setcolor(PLAINSEG_COLOR);
 }
diff --git a/editor/medrobot.c b/editor/medrobot.c
index 72d70671a..186b99aa7 100644
--- a/editor/medrobot.c
+++ b/editor/medrobot.c
@@ -111,18 +111,6 @@ void call_init_ai_object(object *objp, int behavior)
 	init_ai_object(objp-Objects, behavior, hide_segment);
 
 	if (behavior == AIB_STATION) {
-		int	cseg, mseg;
-
-		cseg = 0;
-		mseg = 0;
-
-		if (Cursegp != NULL)
-			cseg = Cursegp-Segments;
-
-		if (Markedsegp != NULL) {
-			mseg = Markedsegp-Segments;
-		}
-
 		objp->ctype.ai_info.follow_path_start_seg = Cursegp-Segments;
 		objp->ctype.ai_info.follow_path_end_seg = Markedsegp-Segments;
 	}
diff --git a/editor/mine.c b/editor/mine.c
index a201f8880..6ba7ea8f9 100644
--- a/editor/mine.c
+++ b/editor/mine.c
@@ -90,7 +90,7 @@ int med_save_mine(char * filename)
 // saves to an already-open file
 int save_mine_data(PHYSFS_file * SaveFile)
 {
-	int  header_offset, editor_offset, vertex_offset, segment_offset, doors_offset, texture_offset, walls_offset, triggers_offset; //, links_offset;
+	int  header_offset, editor_offset, vertex_offset, segment_offset, texture_offset, walls_offset, triggers_offset; //, links_offset;
 	int  newseg_verts_offset;
 	int  newsegment_offset;
 	int  i;
@@ -112,7 +112,7 @@ int save_mine_data(PHYSFS_file * SaveFile)
 	newseg_verts_offset = newsegment_offset + sizeof(segment);
 	walls_offset = newseg_verts_offset + (sizeof(vms_vector)*8);
 	triggers_offset =	walls_offset + (sizeof(wall)*Num_walls);
-	doors_offset = triggers_offset + (sizeof(trigger)*Num_triggers);
+// 	doors_offset = triggers_offset + (sizeof(trigger)*Num_triggers);
 
 	//===================== SAVE FILE INFO ========================
 
@@ -368,6 +368,7 @@ int save_mine_data_compiled(PHYSFS_file *SaveFile)
 				bit_mask |= (1 << sidenum);
 				wallnum = seg->sides[sidenum].wall_num;
 				Assert( wallnum < 255 );		// Get John or Mike.. can only store up to 255 walls!!! 
+				(void)wallnum;
 			}
 		}
 		if (New_file_format_save)
diff --git a/editor/segment.c b/editor/segment.c
index daafadd8b..4965b51d1 100644
--- a/editor/segment.c
+++ b/editor/segment.c
@@ -647,7 +647,7 @@ void	set_matrix_based_on_side(vms_matrix *rotmat,int destside)
 		case WBACK:
 			break;
 	}
-
+	(void)tmpvec;
 }
 
 //	-------------------------------------------------------------------------------------
@@ -1947,9 +1947,6 @@ void med_check_all_vertices()
 {
 	int		s,v;
 	segment	*sp;
-	int		count;
-
-	count = 0;
 
 	for (s=0; s<Num_segments; s++) {
 		sp = &Segments[s];
diff --git a/editor/seguvs.c b/editor/seguvs.c
index c39c6bc84..bf8bbebb3 100644
--- a/editor/seguvs.c
+++ b/editor/seguvs.c
@@ -127,6 +127,7 @@ fix get_average_light_at_vertex(int vnum, short *segs)
 
 			*segs++ = segnum;
 			Assert(segs - original_segs < MAX_LIGHT_SEGS);
+			(void)original_segs;
 
 			for (sidenum=0; sidenum < MAX_SIDES_PER_SEGMENT; sidenum++) {
 				if (!IS_CHILD(segp->children[sidenum])) {
@@ -1045,12 +1046,11 @@ found1: ;
 //	segment to get the wall in the connected segment which shares the edge, and get tmap_num from there.
 void propagate_tmaps_to_segment_sides(segment *base_seg, int base_side, segment *con_seg, int con_side, int uv_only_flag)
 {
-	sbyte		*base_vp,*con_vp;
+	sbyte		*base_vp;
 	int		abs_id1,abs_id2;
 	int		v;
 
 	base_vp = Side_to_verts[base_side];
-	con_vp = Side_to_verts[con_side];
 
 	// Do for each edge on connecting face.
 	for (v=0; v<4; v++) {
diff --git a/iff/iff.c b/iff/iff.c
index 3ea1b37d9..6c9cd699b 100644
--- a/iff/iff.c
+++ b/iff/iff.c
@@ -759,6 +759,7 @@ int write_body(PHYSFS_file *ofile,iff_bitmap_header *bitmap_header,int compressi
 
 	if (compression_on) {		//write actual data length
 		Assert(PHYSFSX_fseek(ofile,save_pos,SEEK_SET)==0);
+		(void)save_pos;
 		PHYSFS_writeSBE32(ofile, total_len);
 		Assert(PHYSFSX_fseek(ofile,total_len,SEEK_CUR)==0);
 		if (total_len&1) PHYSFSX_writeU8(ofile, 0);		//pad to even
@@ -815,6 +816,7 @@ int write_tiny(PHYSFS_file *ofile,iff_bitmap_header *bitmap_header,int compressi
 
 	if (compression_on) {
 		Assert(PHYSFSX_fseek(ofile,save_pos,SEEK_SET)==0);
+		(void)save_pos;
 		PHYSFS_writeSBE32(ofile, 4+total_len);
 		Assert(PHYSFSX_fseek(ofile,4+total_len,SEEK_CUR)==0);
 		if (total_len&1) PHYSFSX_writeU8(ofile, 0);		//pad to even
@@ -853,6 +855,7 @@ int write_pbm(PHYSFS_file *ofile,iff_bitmap_header *bitmap_header,int compressio
 	pbm_size = 4 + BMHD_SIZE + body_size + tiny_size + sizeof(pal_entry)*(1<<bitmap_header->nplanes)+8;
 
 	Assert(PHYSFSX_fseek(ofile,save_pos,SEEK_SET)==0);
+	(void)save_pos;
 	PHYSFS_writeSBE32(ofile, pbm_size+8);
 	Assert(PHYSFSX_fseek(ofile,pbm_size+8,SEEK_CUR)==0);
 
@@ -917,7 +920,6 @@ int iff_read_animbrush(char *ifilename,grs_bitmap **bm_list,int max_bitmaps,int
 {
 	int ret = IFF_NO_ERROR;			//return code
 	PHYSFS_file *ifile;
-	iff_bitmap_header bmheader;
 	int sig,form_len;
 	long form_type;
 
@@ -927,8 +929,6 @@ int iff_read_animbrush(char *ifilename,grs_bitmap **bm_list,int max_bitmaps,int
 	if (ifile == NULL)
 		return IFF_NO_FILE;
 
-	bmheader.raw_data = NULL;
-
 	sig=get_sig(ifile);
 	PHYSFS_readSBE32(ifile, &form_len);
 
diff --git a/main/aipath.c b/main/aipath.c
index 92fe91c59..00572223d 100644
--- a/main/aipath.c
+++ b/main/aipath.c
@@ -585,17 +585,6 @@ void move_object_to_goal(object *objp, vms_vector *goal_point, int goal_seg)
 
 	Assert(objp->segnum != -1);
 
-#ifndef NDEBUG
-	if (objp->segnum != goal_seg)
-		if (find_connect_side(&Segments[objp->segnum], &Segments[goal_seg]) == -1) {
-			fix	dist;
-			dist = find_connected_distance(&objp->pos, objp->segnum, goal_point, goal_seg, 30, WID_FLY_FLAG);
-			if (Connected_segment_distance > 2) {	//	This global is set in find_connected_distance
-				// Int3();
-			}
-		}
-#endif
-
 	aip->cur_path_index += aip->PATH_DIR;
 
 	if (aip->cur_path_index <= 0) {
@@ -636,8 +625,6 @@ void ai_follow_path(object *objp, int player_visibility)
 	fix			dist_to_goal;
 	// robot_info	*robptr = &Robot_info[objp->id];
 	int			forced_break, original_dir, original_index;
-	fix			dist_to_player;
-	int			goal_seg;
 	ai_local		*ailp = &Ai_local_info[objp-Objects];
 	fix			threshold_distance;
 
@@ -675,43 +662,8 @@ if ((aip->hide_index + aip->path_length > Point_segs_free_ptr - Point_segs) && (
 		return;
 
 	goal_point = Point_segs[aip->hide_index + aip->cur_path_index].point;
-	goal_seg = Point_segs[aip->hide_index + aip->cur_path_index].segnum;
 	dist_to_goal = vm_vec_dist_quick(&goal_point, &objp->pos);
 
-	if (Player_is_dead)
-		dist_to_player = vm_vec_dist_quick(&objp->pos, &Viewer->pos);
-	else
-		dist_to_player = vm_vec_dist_quick(&objp->pos, &ConsoleObject->pos);
-
-#if 0
-	//	Efficiency hack: If far away from player, move in big quantized jumps.
-	if ((dist_to_player > F1_0*200) && !(Game_mode & GM_MULTI)) {
-		if (dist_to_goal < F1_0*2)
-			move_object_to_goal(objp, &goal_point, goal_seg);
-		else {
-			robot_info	*robptr = &Robot_info[objp->id];
-			fix	cur_speed = robptr->max_speed[Difficulty_level]/2;
-			fix	distance_travellable = fixmul(FrameTime, cur_speed);
-
-			if (distance_travellable >= dist_to_goal)
-				move_object_to_goal(objp, &goal_point, goal_seg);
-			else {
-				fix	prob = fixdiv(distance_travellable, dist_to_goal);
-
-				int	rand_num = d_rand();
-				if ( (rand_num >> 1) < prob)
-					move_object_to_goal(objp, &goal_point, goal_seg);
-			}
-		}
-
-		//	If we are hiding, we stop when we get to the goal.
-		if (ailp->mode == AIM_HIDE)
-			ailp->mode = AIM_STILL;
-
-		return;
-	}
-#endif
-
 	//	If running from player, only run until can't be seen.
 	if (ailp->mode == AIM_RUN_FROM_OBJECT) {
 		if ((player_visibility == 0) && (ailp->player_awareness_type == 0)) {
@@ -1044,33 +996,26 @@ void ai_reset_all_paths(void)
 //	Try to resume path.
 void attempt_to_resume_path(object *objp)
 {
-	//int				objnum = objp-Objects;
-	ai_static		*aip = &objp->ctype.ai_info;
-//	int				goal_segnum, object_segnum,
-	int				abs_index, new_path_index;
+	ai_static *aip = &objp->ctype.ai_info;
+	int new_path_index;
 
 	if (aip->behavior == AIB_STATION)
 		if (d_rand() > 8192) {
-			ai_local			*ailp = &Ai_local_info[objp-Objects];
+			ai_local *ailp = &Ai_local_info[objp-Objects];
 
 			aip->hide_segment = objp->segnum;
 			ailp->mode = AIM_STILL;
 		}
 
-//	object_segnum = objp->segnum;
-	abs_index = aip->hide_index+aip->cur_path_index;
-//	goal_segnum = Point_segs[abs_index].segnum;
-
 	new_path_index = aip->cur_path_index - aip->PATH_DIR;
 
 	if ((new_path_index >= 0) && (new_path_index < aip->path_length)) {
 		aip->cur_path_index = new_path_index;
 	} else {
-		//	At end of line and have nowhere to go.
+		// At end of line and have nowhere to go.
 		move_towards_segment_center(objp);
 		create_path_to_station(objp, 15);
 	}
-
 }
 
 //	----------------------------------------------------------------------------------------------------------
@@ -1265,6 +1210,7 @@ void player_follow_path(object *objp)
 	goal_point = Point_segs[Player_hide_index + Player_cur_path_index].point;
 	goal_seg = Point_segs[Player_hide_index + Player_cur_path_index].segnum;
 	Assert((goal_seg >= 0) && (goal_seg <= Highest_segment_index));
+	(void)goal_seg;
 	dist_to_goal = vm_vec_dist_quick(&goal_point, &objp->pos);
 
 	if (Player_cur_path_index < 0)
diff --git a/main/bmread.c b/main/bmread.c
index b81c76927..ca8038349 100644
--- a/main/bmread.c
+++ b/main/bmread.c
@@ -1182,8 +1182,6 @@ void bm_read_object(int skip)
         int first_bitmap_num, first_bitmap_num_dead=0, n_normal_bitmaps;
 	char *equal_ptr;
 	short model_num;
-	short explosion_vclip_num = -1;
-	short explosion_sound_num = SOUND_ROBOT_DESTROYED;
 	fix	lighting = F1_0/2;		// Default
 	int type=-1;
 	fix strength=0;
@@ -1212,14 +1210,9 @@ void bm_read_object(int skip)
 					type = OL_CLUTTER;
 				else if (!stricmp(equal_ptr,"exit"))
 					type = OL_EXIT;
-			}
-			else if (!stricmp( arg, "exp_vclip" ))	{
-				explosion_vclip_num = atoi(equal_ptr);
 			} else if (!stricmp( arg, "dead_pof" ))	{
 				model_name_dead = equal_ptr;
 				first_bitmap_num_dead=N_ObjBitmapPtrs;
-			} else if (!stricmp( arg, "exp_sound" ))	{
-				explosion_sound_num = atoi(equal_ptr);
 			} else if (!stricmp( arg, "lighting" ))	{
 				lighting = fl2f(atof(equal_ptr));
 				if ( (lighting < 0) || (lighting > F1_0 )) {
diff --git a/main/dumpmine.c b/main/dumpmine.c
index 96ca6bb99..39e55074a 100644
--- a/main/dumpmine.c
+++ b/main/dumpmine.c
@@ -865,22 +865,13 @@ void dump_used_textures_level(PHYSFS_file *my_file, int level_num)
 {
 	int	i;
 	int	temp_tmap_buf[MAX_TEXTURES];
-	int	perm_tmap_buf[MAX_TEXTURES];
 	sbyte	level_tmap_buf[MAX_TEXTURES];
 	int	temp_wall_buf[MAX_WALL_ANIMS];
-	int	perm_wall_buf[MAX_WALL_ANIMS];
 
-	for (i=0; i<MAX_TEXTURES; i++) {
-		perm_tmap_buf[i] = 0;
+	for (i=0; i<MAX_TEXTURES; i++)
 		level_tmap_buf[i] = -1;
-	}
-
-	for (i=0; i<MAX_WALL_ANIMS; i++) {
-		perm_wall_buf[i] = 0;
-	}
 
 	determine_used_textures_level(0, 1, level_num, temp_tmap_buf, temp_wall_buf, level_tmap_buf, MAX_TEXTURES);
-// -- 	determine_used_textures_robots(temp_tmap_buf);
 	PHYSFSX_printf(my_file, "\nTextures used in [%s]\n", Gamesave_current_filename);
 	say_used_tmaps(my_file, temp_tmap_buf);
 }
diff --git a/main/fvi.c b/main/fvi.c
index 16c9b6bcb..556ced522 100644
--- a/main/fvi.c
+++ b/main/fvi.c
@@ -697,6 +697,7 @@ int find_vector_intersection(fvi_query *fq,fvi_info *hit_data)
 		//problems, try using zero radius and see if we hit a wall
 
 		new_hit_type = fvi_sub(&new_hit_pnt,&new_hit_seg2,fq->p0,fq->startseg,fq->p1,0,fq->thisobjnum,fq->ignore_obj_list,fq->flags,hit_data->seglist,&hit_data->n_segs,-2);
+		(void)new_hit_type; // FIXME! This should become hit_type, right?
 
 		if (new_hit_seg2 != -1) {
 			hit_seg = new_hit_seg2;
diff --git a/main/gamemine.c b/main/gamemine.c
index cde4b3630..92e62b843 100644
--- a/main/gamemine.c
+++ b/main/gamemine.c
@@ -513,7 +513,7 @@ int load_mine_data_compiled(PHYSFS_file *LoadFile)
 
 	//=============================== Reading part ==============================
 	compiled_version = PHYSFSX_readByte(LoadFile);
-	//Assert( compiled_version==COMPILED_MINE_VERSION );
+	(void)compiled_version;
 
 	if (New_file_format_load)
 		Num_vertices = PHYSFSX_readShort(LoadFile);
diff --git a/main/gamesave.c b/main/gamesave.c
index ba3615d32..42b5c0234 100644
--- a/main/gamesave.c
+++ b/main/gamesave.c
@@ -762,6 +762,7 @@ int load_game_data(PHYSFS_file *LoadFile)
 
 	trig_size = PHYSFSX_readInt(LoadFile);
 	Assert(trig_size == sizeof(ControlCenterTriggers));
+	(void)trig_size;
 	PHYSFSX_fseek(LoadFile, 4, SEEK_CUR);
 
 	Num_robot_centers = PHYSFSX_readInt(LoadFile);
@@ -1013,14 +1014,9 @@ int load_game_data(PHYSFS_file *LoadFile)
 		for (t=0; t<Num_triggers; t++) {
 			int	l;
 			for (l=0; l<Triggers[t].num_links; l++) {
-				int	seg_num, side_num, wall_num;
+				int	seg_num;
 
 				seg_num = Triggers[t].seg[l];
-				side_num = Triggers[t].side[l];
-				wall_num = Segments[seg_num].sides[side_num].wall_num;
-
-				// -- if (Walls[wall_num].controlling_trigger != -1)
-				// -- 	Int3();
 
 				//check to see that if a trigger requires a wall that it has one,
 				//and if it requires a matcen that it has one
@@ -1148,6 +1144,7 @@ int load_level(char * filename_passed)
 	gamedata_offset          = PHYSFSX_readInt(LoadFile);
 
 	Assert(sig == MAKE_SIG('P','L','V','L'));
+	(void)sig;
 
 	if (Gamesave_current_version < 5)
 		hostagetext_offset = PHYSFSX_readInt(LoadFile);
@@ -1185,6 +1182,7 @@ int load_level(char * filename_passed)
 	PHYSFSX_fseek(LoadFile,hostagetext_offset,SEEK_SET);
 	load_hostage_data(LoadFile,(version>=1));
 	#endif
+	(void)hostagetext_offset;
 
 	//======================== CLOSE FILE =============================
 
diff --git a/main/gauges.c b/main/gauges.c
index 1f85ae79a..04e425ac6 100644
--- a/main/gauges.c
+++ b/main/gauges.c
@@ -981,7 +981,7 @@ void hud_show_energy(void)
 
 void show_bomb_count(int x,int y,int bg_color,int always_show,int right_align)
 {
-	int bomb,count,countx,w=0,h=0,aw=0;
+	int bomb,count,w=0,h=0,aw=0;
 	char txt[5],*t;
 
 	if (!PlayerCfg.BombGauge)
@@ -990,11 +990,7 @@ void show_bomb_count(int x,int y,int bg_color,int always_show,int right_align)
 	bomb = PROXIMITY_INDEX;
 	count = Players[Player_num].secondary_ammo[bomb];
 
-//	#ifndef RELEASE
 	count = min(count,99);	//only have room for 2 digits - cheating give 200
-//	#endif
-
-	countx = (bomb==PROXIMITY_INDEX)?count:-count;
 
 	if (always_show && count == 0)		//no bombs, draw nothing on HUD
 		return;
diff --git a/main/newdemo.c b/main/newdemo.c
index 954e7eb5f..030961f6b 100644
--- a/main/newdemo.c
+++ b/main/newdemo.c
@@ -3468,12 +3468,10 @@ void newdemo_strip_frames(char *outname, int bytes_to_strip)
 {
 	PHYSFS_file *outfile;
 	char *buf;
-	int total_size, bytes_done, read_elems, bytes_back;
+	int read_elems, bytes_back;
 	int trailer_start, loc1, loc2, stop_loc, bytes_to_read;
 	short last_frame_length;
 
-	bytes_done = 0;
-	total_size = PHYSFS_fileLength(infile);
 	outfile = PHYSFSX_openWriteBuffered(outname);
 	if (outfile == NULL) {
 		nm_messagebox( NULL, 1, TXT_OK, "Can't open output file" );
diff --git a/main/newmenu.c b/main/newmenu.c
index 59dcb0e39..2bfee2183 100644
--- a/main/newmenu.c
+++ b/main/newmenu.c
@@ -123,6 +123,7 @@ void nm_draw_background1(char * filename)
 			gr_init_bitmap_data (&nm_background1);
 			pcx_error = pcx_read_bitmap( filename, &nm_background1, BM_LINEAR, gr_palette );
 			Assert(pcx_error == PCX_ERROR_NONE);
+			(void)pcx_error;
 		}
 		gr_palette_load( gr_palette );
 		show_fullscr(&nm_background1);
@@ -147,6 +148,7 @@ void nm_draw_background(int x1, int y1, int x2, int y2 )
 		gr_init_bitmap_data (&nm_background);
 		pcx_error = pcx_read_bitmap(MENU_BACKGROUND_BITMAP,&nm_background,BM_LINEAR,background_palette);
 		Assert(pcx_error == PCX_ERROR_NONE);
+		(void)pcx_error;
 		gr_remap_bitmap_good( &nm_background, background_palette, -1, -1 );
 		BGScaleX=((float)SWIDTH/nm_background.bm_w);
 		BGScaleY=((float)SHEIGHT/nm_background.bm_h);
@@ -1386,7 +1388,7 @@ void newmenu_create_structure( newmenu *menu )
 int newmenu_draw(window *wind, newmenu *menu)
 {
 	grs_canvas *menu_canvas = window_get_canvas(wind), *save_canvas = grd_curcanv;
-	int tw, th = 0, ty, sx, sy;
+	int th = 0, ty, sx, sy;
 	int i;
 	int string_width, string_height, average_width;
 
@@ -1412,7 +1414,6 @@ int newmenu_draw(window *wind, newmenu *menu)
 		gr_set_curfont(HUGE_FONT);
 		gr_set_fontcolor( BM_XRGB(31,31,31), -1 );
 		gr_get_string_size(menu->title,&string_width,&string_height,&average_width );
-		tw = string_width;
 		th = string_height;
 		gr_printf( 0x8000, ty, menu->title );
 	}
@@ -1421,7 +1422,6 @@ int newmenu_draw(window *wind, newmenu *menu)
 		gr_set_curfont(MEDIUM3_FONT);
 		gr_set_fontcolor( BM_XRGB(21,21,21), -1 );
 		gr_get_string_size(menu->subtitle,&string_width,&string_height,&average_width );
-		tw = string_width;
 		gr_printf( 0x8000, ty+th, menu->subtitle );
 	}
 
@@ -1545,7 +1545,6 @@ newmenu *newmenu_do4( char * title, char * subtitle, int nitems, newmenu_item *
 {
 	window *wind = NULL;
 	newmenu *menu;
-	grs_canvas *menu_canvas;
 
 	MALLOC(menu, newmenu, 1);
 
@@ -1596,7 +1595,6 @@ newmenu *newmenu_do4( char * title, char * subtitle, int nitems, newmenu_item *
 		return NULL;
 	}
 	menu->wind = wind;
-	menu_canvas = window_get_canvas(wind);
 
 	return menu;
 }
diff --git a/main/piggy.c b/main/piggy.c
index 4e062acf1..2ab7dbec5 100644
--- a/main/piggy.c
+++ b/main/piggy.c
@@ -279,8 +279,7 @@ int properties_init()
 	DiskBitmapHeader bmh;
 	DiskSoundHeader sndh;
 	int header_size, N_bitmaps, N_sounds;
-	int i,size, length;
-	int read_sounds = 1;
+	int i,size;
 	int Pigdata_start;
 	int pigsize;
 	int retval;
@@ -288,10 +287,6 @@ int properties_init()
 	hashtable_init( &AllBitmapsNames, MAX_BITMAP_FILES );
 	hashtable_init( &AllDigiSndNames, MAX_SOUND_FILES );
 
-	if (GameArg.SndNoSound)
-	{
-		read_sounds = 0;
-	}
 	
 	for (i=0; i<MAX_SOUND_FILES; i++ )	{
 #ifdef ALLEGRO
@@ -393,7 +388,6 @@ int properties_init()
 
 	PHYSFSX_fseek( Piggy_fp, Pigdata_start, SEEK_SET );
 	size = PHYSFS_fileLength(Piggy_fp) - Pigdata_start;
-	length = size;
 
 	N_bitmaps = PHYSFSX_readInt(Piggy_fp);
 	size -= sizeof(int);
@@ -616,7 +610,7 @@ void piggy_critical_error()
 void piggy_bitmap_page_in( bitmap_index bitmap )
 {
 	grs_bitmap * bmp;
-	int i,org_i,temp;
+	int i,org_i;
 
         org_i = 0;
 			
@@ -669,7 +663,7 @@ void piggy_bitmap_page_in( bitmap_index bitmap )
 			memcpy( &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], &zsize, sizeof(int) );
 			Piggy_bitmap_cache_next += sizeof(int);
 			descent_critical_error = 0;
-			temp = PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, zsize-4 );
+			PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, zsize-4 );
 			if ( descent_critical_error )	{
 				piggy_critical_error();
 				goto ReDoIt;
@@ -688,7 +682,7 @@ void piggy_bitmap_page_in( bitmap_index bitmap )
 				goto ReDoIt;
 			}
 			descent_critical_error = 0;
-			temp = PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, bmp->bm_h*bmp->bm_w );
+			PHYSFS_read( Piggy_fp, &Piggy_bitmap_cache_data[Piggy_bitmap_cache_next], 1, bmp->bm_h*bmp->bm_w );
 			if ( descent_critical_error )	{
 				piggy_critical_error();
 				goto ReDoIt;
diff --git a/main/render.c b/main/render.c
index a0ca7b47e..b0ab9823f 100644
--- a/main/render.c
+++ b/main/render.c
@@ -101,8 +101,6 @@ int	Render_only_bottom=0;
 int	Bottom_bitmap_num = 9;
 #endif
 
-fix	Face_reflectivity = (F1_0/2);
-
 #ifdef EDITOR
 int _search_mode = 0;			//true if looking for curseg,side,face
 short _search_x,_search_y;	//pixel we're looking at
@@ -185,12 +183,10 @@ extern int Current_level_num;
 //	tmap1, tmap2 are texture map ids.  tmap2 is the pasty one.
 void render_face(int segnum, int sidenum, int nv, int *vp, int tmap1, int tmap2, uvl *uvlp, vms_vector *norm)
 {
-// 	fix		face_light;
 	grs_bitmap	*bm;
 #ifdef OGL
 	grs_bitmap	*bm2=NULL;
 #endif
-	fix		reflect;
 	g3s_uvl		uvl_copy[8];
 	g3s_lrgb	dyn_light[8];
 	int		i;
@@ -205,8 +201,6 @@ void render_face(int segnum, int sidenum, int nv, int *vp, int tmap1, int tmap2,
 		pointlist[i] = &Segment_points[vp[i]];
 	}
 
-// 	face_light = -vm_vec_dot(&Viewer->orient.fvec,norm);
-
 	if (tmap1 >= NumTextures) {
 		Int3();
 		Segments[segnum].sides[sidenum].tmap_num = 0;
@@ -236,54 +230,45 @@ void render_face(int segnum, int sidenum, int nv, int *vp, int tmap1, int tmap2,
 
 	Assert( !(bm->bm_flags & BM_FLAG_PAGED_OUT) );
 
-	//reflect = fl2f((1.0-TmapInfo[p->tmap_num].reflect)/2.0 + 0.5);
-	//reflect = fl2f((1.0-TmapInfo[p->tmap_num].reflect));
-
-	reflect = Face_reflectivity;		// f1_0;	//until we figure this stuff out...
-
 	//set light values for each vertex & build pointlist
+	for (i=0;i<nv;i++)
 	{
-		int i;
+		//the uvl struct has static light already in it
 
-		for (i=0;i<nv;i++)
+		//scale static light for destruction effect
+		if (Control_center_destroyed)	//make lights flash
+			uvl_copy[i].l = fixmul(flash_scale,uvl_copy[i].l);
+		//add in dynamic light (from explosions, etc.)
+		uvl_copy[i].l += (Dynamic_light[vp[i]].r+Dynamic_light[vp[i]].g+Dynamic_light[vp[i]].b)/3;
+		//saturate at max value
+		if (uvl_copy[i].l > MAX_LIGHT)
+			uvl_copy[i].l = MAX_LIGHT;
+
+		// And now the same for the ACTUAL (rgb) light we want to use
+
+		//scale static light for destruction effect
+		if (Control_center_destroyed)	//make lights flash
 		{
-			//the uvl struct has static light already in it
-
-			//scale static light for destruction effect
-			if (Control_center_destroyed)	//make lights flash
-				uvl_copy[i].l = fixmul(flash_scale,uvl_copy[i].l);
-			//add in dynamic light (from explosions, etc.)
-			uvl_copy[i].l += (Dynamic_light[vp[i]].r+Dynamic_light[vp[i]].g+Dynamic_light[vp[i]].b)/3;
-			//saturate at max value
-			if (uvl_copy[i].l > MAX_LIGHT)
-				uvl_copy[i].l = MAX_LIGHT;
-
-			// And now the same for the ACTUAL (rgb) light we want to use
-
-			//scale static light for destruction effect
-			if (Control_center_destroyed)	//make lights flash
+			if (PlayerCfg.DynLightColor) // let the mine glow red a little
 			{
-				if (PlayerCfg.DynLightColor) // let the mine glow red a little
-				{
-					dyn_light[i].r = fixmul(flash_scale>=f0_5*1.5?flash_scale:f0_5*1.5,uvl_copy[i].l);
-					dyn_light[i].g = dyn_light[i].b = fixmul(flash_scale,uvl_copy[i].l);
-				}
-				else
-					dyn_light[i].r = dyn_light[i].g = dyn_light[i].b = fixmul(flash_scale,uvl_copy[i].l);
+				dyn_light[i].r = fixmul(flash_scale>=f0_5*1.5?flash_scale:f0_5*1.5,uvl_copy[i].l);
+				dyn_light[i].g = dyn_light[i].b = fixmul(flash_scale,uvl_copy[i].l);
 			}
-
-			// add light color
-			dyn_light[i].r += Dynamic_light[vp[i]].r;
-			dyn_light[i].g += Dynamic_light[vp[i]].g;
-			dyn_light[i].b += Dynamic_light[vp[i]].b;
-			// saturate at max value
-			if (dyn_light[i].r > MAX_LIGHT)
-				dyn_light[i].r = MAX_LIGHT;
-			if (dyn_light[i].g > MAX_LIGHT)
-				dyn_light[i].g = MAX_LIGHT;
-			if (dyn_light[i].b > MAX_LIGHT)
-				dyn_light[i].b = MAX_LIGHT;
+			else
+				dyn_light[i].r = dyn_light[i].g = dyn_light[i].b = fixmul(flash_scale,uvl_copy[i].l);
 		}
+
+		// add light color
+		dyn_light[i].r += Dynamic_light[vp[i]].r;
+		dyn_light[i].g += Dynamic_light[vp[i]].g;
+		dyn_light[i].b += Dynamic_light[vp[i]].b;
+		// saturate at max value
+		if (dyn_light[i].r > MAX_LIGHT)
+			dyn_light[i].r = MAX_LIGHT;
+		if (dyn_light[i].g > MAX_LIGHT)
+			dyn_light[i].g = MAX_LIGHT;
+		if (dyn_light[i].b > MAX_LIGHT)
+			dyn_light[i].b = MAX_LIGHT;
 	}
 
 
@@ -329,7 +314,7 @@ void check_face(int segnum, int sidenum, int facenum, int nv, int *vp, int tmap1
 		int save_lighting;
 		grs_bitmap *bm;
 		g3s_uvl uvl_copy[8];
-		g3s_lrgb dyn_light[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
+		g3s_lrgb dyn_light[8];
 		g3s_point *pointlist[4];
 
 		if (tmap2 > 0 )
@@ -754,11 +739,8 @@ void outline_seg_side(segment *seg,int _side,int edge,int vert)
 	cc=rotate_list(8,seg->verts);
 
 	if (! cc.and) {		//all off screen?
-		side *s;
 		g3s_point *pnt;
 
-		s=&seg->sides[_side];
-
 		//render curedge of curside of curseg in green
 
 		gr_setcolor(BM_XRGB(0,63,0));
diff --git a/main/titles.c b/main/titles.c
index 9c00177f6..3eff0adfd 100644
--- a/main/titles.c
+++ b/main/titles.c
@@ -546,6 +546,7 @@ int briefing_process_char(briefing *br)
 			char		bitmap_name[32];
 			ubyte		temp_palette[768];
 			int		iff_error;
+			(void)iff_error;
 
 			if (br->robot_canv != NULL)
 			{
@@ -670,12 +671,14 @@ void show_animated_bitmap(briefing *br)
 {
 	grs_canvas  *curcanv_save, *bitmap_canv=0;
 	grs_bitmap	*bitmap_ptr;
+#ifdef OGL
 	float scale = 1.0;
 
 	if (((float)SWIDTH/320) < ((float)SHEIGHT/200))
 		scale = ((float)SWIDTH/320);
 	else
 		scale = ((float)SHEIGHT/200);
+#endif
 
 	// Only plot every nth frame.
 	if (br->door_div_count) {
@@ -779,17 +782,20 @@ void show_animated_bitmap(briefing *br)
 void show_briefing_bitmap(grs_bitmap *bmp)
 {
 	grs_canvas	*curcanv_save, *bitmap_canv;
+#ifdef OGL
 	float scale = 1.0;
+#endif
 
 	bitmap_canv = gr_create_sub_canvas(grd_curcanv, rescale_x(220), rescale_y(55), (bmp->bm_w*(SWIDTH/(HIRESMODE ? 640 : 320))),(bmp->bm_h*(SHEIGHT/(HIRESMODE ? 480 : 200))));
 	curcanv_save = grd_curcanv;
 	gr_set_current_canvas(bitmap_canv);
 
+#ifdef OGL
 	if (((float)SWIDTH/(HIRESMODE ? 640 : 320)) < ((float)SHEIGHT/(HIRESMODE ? 480 : 200)))
 		scale = ((float)SWIDTH/(HIRESMODE ? 640 : 320));
 	else
 		scale = ((float)SHEIGHT/(HIRESMODE ? 480 : 200));
-#ifdef OGL
+
 	ogl_ubitmapm_cs(0,0,bmp->bm_w*scale,bmp->bm_h*scale,bmp,255,F1_0);
 #else
 	gr_bitmapm(0, 0, bmp);
diff --git a/texmap/ntmap.c b/texmap/ntmap.c
index 4f5576b56..d753ff828 100644
--- a/texmap/ntmap.c
+++ b/texmap/ntmap.c
@@ -646,14 +646,7 @@ void ntexture_map_lighted(grs_bitmap *srcb, g3ds_tmap *t)
 // -------------------------------------------------------------------------------------
 void ntmap_scanline_lighted_linear(grs_bitmap *srcb, int y, fix xleft, fix xright, fix uleft, fix uright, fix vleft, fix vright, fix lleft, fix lright)
 {
-	fix	u,v,l;
-	fix	dx,recip_dx;
-
-	fix	du_dx,dv_dx,dl_dx;
-
-	u = uleft;
-	v = vleft;
-	l = lleft;
+	fix	dx,recip_dx,du_dx,dv_dx,dl_dx;
 
 	dx = f2i(xright) - f2i(xleft);
 	if ((dx < 0) || (xright < 0) || (xleft > xright))		// the (xleft > xright) term is not redundant with (dx < 0) because dx is computed using integers
diff --git a/texmap/scanline.c b/texmap/scanline.c
index e1c1f1d91..0d889a210 100644
--- a/texmap/scanline.c
+++ b/texmap/scanline.c
@@ -975,7 +975,7 @@ void c_tmap_scanline_quad()
 	fix u,v,l,dudx, dvdx, dldx;
 
 	// Quadratic setup stuff:
-	fix a0, a1, a2, b0, b1, b2, dudx1, dvdx1;
+	fix a1, a2, b1, b2, dudx1, dvdx1;
 	fix u0 = fx_u;
 	fix u2 = fx_u + fx_du_dx*(fx_xright-fx_xleft+1);	// This just needs to be uright from outer loop
 	fix v0 = fx_v;
@@ -989,8 +989,6 @@ void c_tmap_scanline_quad()
 	v0 = fixdiv( v0, w0 );	// Divide Z out.  This should be in outer loop
 	u2 = fixdiv( u2, w2 );	// Divide Z out.  This should be in outer loop
 	v2 = fixdiv( v2, w2 );	// Divide Z out.  This should be in outer loop
-	a0 = u0;									
-	b0 = v0;
 	a1 = (-3*u0+4*u1-u2)/dx;			
 	b1 = (-3*v0+4*v1-v2)/dx;
 	a2 = (2*(u0-2*u1+u2))/(dx*dx);	
diff --git a/ui/button.c b/ui/button.c
index cb75dd8c7..e2c7cd063 100644
--- a/ui/button.c
+++ b/ui/button.c
@@ -129,7 +129,6 @@ UI_GADGET_BUTTON * ui_add_gadget_button( UI_DIALOG * dlg, short x, short y, shor
 
 void ui_button_do( UI_GADGET_BUTTON * button, int keypress )
 {
-	int result;
 	int OnMe, ButtonLastSelected;
 
 	OnMe = ui_mouse_on_gadget( (UI_GADGET *)button );
@@ -162,7 +161,7 @@ void ui_button_do( UI_GADGET_BUTTON * button, int keypress )
 
 	if ((keypress == button->hotkey1) && button->user_function1 )
 	{
-		result = button->user_function1();
+		button->user_function1();
 		last_keypress = 0;
 	}
 
@@ -190,11 +189,6 @@ void ui_button_do( UI_GADGET_BUTTON * button, int keypress )
 
 	if (button->pressed && button->user_function )
 	{
-		result = button->user_function();
+		button->user_function();
 	}
 }
-
-
-
-
-
diff --git a/ui/inputbox.c b/ui/inputbox.c
index 8bf705637..46882ef79 100644
--- a/ui/inputbox.c
+++ b/ui/inputbox.c
@@ -83,15 +83,13 @@ void ui_draw_inputbox( UI_GADGET_INPUTBOX * inputbox )
 
 UI_GADGET_INPUTBOX * ui_add_gadget_inputbox( UI_DIALOG * dlg, short x, short y, short length, short slength, char * text )
 {
-	int h, w, aw, f;
+	int h, w, aw;
 	UI_GADGET_INPUTBOX * inputbox;
 
 	gr_get_string_size( NULL, &w, &h, &aw );
 
 	inputbox = (UI_GADGET_INPUTBOX *)ui_gadget_add( dlg, 6, x, y, x+aw*slength-1, y+h-1+4 );
 
-	f = 0;
-
 	inputbox->text = d_malloc(length + 1);
 	strncpy( inputbox->text, text, length );
 	inputbox->position = strlen(inputbox->text);
diff --git a/ui/keypad.c b/ui/keypad.c
index 169a05566..f28e86d9e 100644
--- a/ui/keypad.c
+++ b/ui/keypad.c
@@ -273,14 +273,13 @@ void ui_pad_goto_next()
 
 void ui_pad_goto_prev()
 {
-	int i, si;
+	int i;
 
 	if (active_pad == -1 ) 
 		active_pad = MAX_NUM_PADS;
 	
 	i = active_pad - 1;
 	if (i<0) i= MAX_NUM_PADS - 1;
-	si = i;
 	
 	while( KeyPad[i]==NULL )
 	{
diff --git a/ui/keytrap.c b/ui/keytrap.c
index 43f394c53..d96d55c86 100644
--- a/ui/keytrap.c
+++ b/ui/keytrap.c
@@ -37,10 +37,8 @@ UI_GADGET_KEYTRAP * ui_add_gadget_keytrap( UI_DIALOG * dlg, int key_to_trap, int
 
 void ui_keytrap_do( UI_GADGET_KEYTRAP * keytrap, int keypress )
 {
-	int result;
-
 	if ( keypress == keytrap->trap_key )
 	{
-		result = keytrap->user_function();
+		keytrap->user_function();
 	}
 }
diff --git a/ui/popup.c b/ui/popup.c
index dd733ba48..5b3d39015 100644
--- a/ui/popup.c
+++ b/ui/popup.c
@@ -34,7 +34,6 @@ int PopupMenu( int NumButtons, char * text[] )
 	UI_DIALOG * dlg;
 	UI_GADGET_BUTTON * ButtonG[10];
 
-	short SavedMouseX, SavedMouseY;
 	char * Button[10];
 
 	int button_width, button_height, width, height;
@@ -60,8 +59,6 @@ int PopupMenu( int NumButtons, char * text[] )
 		return -1;
 	}
 
-	SavedMouseX = Mouse.x; SavedMouseY = Mouse.y;
-
 	button_width = button_height = 0;
 
 	gr_set_current_canvas( &grd_curscreen->sc_canvas );
diff --git a/ui/scroll.c b/ui/scroll.c
index eab39960f..63a9b6e53 100644
--- a/ui/scroll.c
+++ b/ui/scroll.c
@@ -27,13 +27,10 @@ static char rcsid[] = "$Id: scroll.c,v 1.1.1.1 2006/03/17 19:52:16 zicodxx Exp $
 
 void ui_draw_scrollbar( UI_GADGET_SCROLLBAR * scrollbar )
 {
-	int x, y;
-
 	if (scrollbar->status==0)
 		return;
 
 	scrollbar->status = 0;
-	x = y = 0;
 	ui_mouse_hide();
 	gr_set_current_canvas( scrollbar->canvas );