the file icons don't come from the .desktop Icon, they are mode on the mimetype (you can see the mimetype in e.g nautilus properties)
you can run "gvfs-info <somefile>" to get the details of the mimetype and icon it's using
the file icons don't come from the .desktop Icon, they are mode on the mimetype (you can see the mimetype in e.g nautilus properties)
you can run "gvfs-info <somefile>" to get the details of the mimetype and icon it's using