Okay, I checked the mimeapps.list file and all the x-content lines are there.
Originally Posted by mc4man
Also there are desktop files for all the apps listed in the mimeapps.list file.
However, I have several desktop files for many of the apps listed on the x-content lines. For example, I have the following desktop files listed for Rhythmbox: rhythmbox.desktop, Rhythmbox.desktop, Rhythmbox-1.desktop, and rhythmbox-device.desktop. I have moved some of my menu locations to other locations, and I understand that a new desktop file is created by alacarte. So I suppose that is why I have the multiple desktop files for the given applications.
If I try to execute these desktop files, I get the following message:
Perhaps this is correct because in the Properties of these desktop files, the executable box is not checked, but I wonder if it has anything to do with not being able to assign applications to the Nautilus actions. Obviously, I am at a loss as to why nothing shows when I try to set the actions in Nautilus or when I insert an audio CD for example.
Untrusted application launcher