1. Bookmarks

The `bookmark` save file has been moved to the `.cache` directory, if
you have a bookmark file `~/.emacs.d/bookmarks` then you'll have to move
it to file `~/.emacs.d/.cache/bookmarks`

2. Ruby on Rails

Ruby on Rails framework has now its own layer called `ruby-on-rails`,
be sure to add this layer to your dotfile if you use it.

3. Django

Django framework has now its own layer called `django`,
be sure to add this layer to your dotfile if you use it.

4. Salt

Salt layer requires the YAML layer, be sure to add the `yaml` layer
to your dotfile if you use `salt` layer.