I have the same problem, totem sometimes crashes when changing volume. This does not seem to depend on file type played - I've got this error with mp3, avi, wma and others. Also, similar problem appears in Rhythmbox, as described in Bug #517310. I've installed all -dbg files necessary and attach crash trace here.
** Attachment added: "totem_crash.txt" https://bugs.launchpad.net/ubuntu/+source/totem/+bug/625048/+attachment/1867162/+files/totem_crash.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/625048 Title: Totem Crashes On Adjusting Volume -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs