Since upgrading from Fedora 8 to Fedora 9, any time I run VirtualBox, the program itself, and OTHER programs will randomly, individually, and silently quit. The windows just disappear. It has happened with VirtualBox, Firefox, Thunderbird, OpenOffice, Pidgin, and Filezilla at least. The problem does not happen when I go several days without using VirtualBox, but it happens very consistently while I'm using VirtualBox or even after I've closed VirtualBox (or after it has crashed), until I restart the system.
Any thoughts?