I'm seeing the same thing here, even with a fresh user. The only diagnostic I can find is the following message in .xsession-errors:
(gnome-panel:14206): Bonobo-WARNING **: Cannot get value: Unknown CORBA exception id: 'IDL:omg.org/CORBA/COMM_FAILURE:1.0' -- lastest update to control center breaks slab (main menu) https://bugs.launchpad.net/bugs/105440 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [EMAIL PROTECTED] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
