That looks like a memory corruption, could you get valgrind log (https://wiki.ubuntu.com/Valgrind) for that problem?
** Changed in: gtk+2.0 (Ubuntu) Status: Confirmed => Needs Info -- [apport] gnome-panel crashed with SIGSEGV in ??() https://launchpad.net/bugs/81723 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs