gnome-panel (ulb 2.8) problem

One for James, this. My gnome-panel "vibrates" when occasional applications are open: I can't think of any other way to describe it! It has happened with Firefox and Seahorse, but not every time. Where should I look for clues - starting the applicaton from a terminal doesn't help. David -- Registered Linux User No 207521 The Linux Counter: http://counter.li.org/ "The above is my personal opinion and does not necessarily reflect that of the little voices in my head."