The backtrace might not reflect the problem. Could you try to get a valgrind log for it? (you can follow the instructions from https://wiki.ubuntu.com/Valgrind for that)
-- Gimp crash on startup (hang on xsane) https://launchpad.net/bugs/86197 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
