Ok, this one is new to me: I lost the preview thumbnails for video files, but libarts1-xine-trinity is installed. When I open a folder with a videofile (mp4/mkv) I get this line in .xsession-errors :

sh: 2: Syntax error: Unterminated quoted string

and the gear "T" just keeps spinneng forever.

Any idea how I can get the thumbnails back?

Nik