This has been annoying me for months now, so I thought I'd post it here...
Folders (when you right click in Nautilus) have the option "Open with Other Application". It allows you to choose an application to handle folders.
Unfortunately, if you are stupid enough to use it, you can NOT remove them! On normal files, there is a tab on Right Click/Properties called "Open With" which allows you to remove them.
On folders, there is no such tab (at least for me).
- You can add an "Open With" handler to folders, but you cannot remove it without directly editing mimeapps.list.
- Even after removing the handlers, you still have "Open with Other Application" on the folder's context menu. Why have it there at all, if it is a trap!
There is enough junk on the context menus for files and folders - it would be great if this could be sorted out, because the option really is idiotic to have on a folder if you can't remove them later on.