That looks like a corruption bug, could you install libgstreamer0.10-0-dbg and get a valgrind log (https://wiki.ubuntu.com/Valgrind)?
-- Rhythmbox crashes while playing MP3 https://launchpad.net/bugs/85828 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
