I don't know if this is related to the issue, but on logout, if you move your mouse over the buttons on the shutdown dialog, the tooltips stack up behind the mouse and do not get repainted leaving you with a deck-of-cards looks on the right side of the dialog. If you 'Cancel' the shutdown, then all tooltips are removed when the window is repainted. If you have any ideas what to check, let me know. I'll try turning SAK off and see if that help.