Cover up dude On a serious note, i'll give this app a shot and see if there is some problem with the app version itself. Segmentation fault can mean anything from faulty hardware to faulty app. Just to check are you running on an overclocked kernel? look into the Tracker,xml and if it is not specificaly useful (or doesnt look like it) another thing to do is to delete the Tracker.xml and try running rygel from command line as a normal user.