Question for KDE 3.4 beta users

KDE 3.4 looks nice and appears to run well for me so far with one exception...I can't launch gnome apps from the KDE menu. What I mean is that since upgrading, I continue to be able to launch KDE apps like Kopete and Kontact from the KDE menu, but gnome apps like Evolution and Firefox do not launch when selected from the menu. I *can* launch them from the Konsole, but not from the menu. Is anyone else seeing this? Any ideas how I might fix this behavior? Thanks.