I'm having strange problem. I have Gnome and KDE installed but sometimes when I'm running KDE suddenly Gnome background flashes in the desktop. Then after some waiting it returns back to normal KDE background. Same thing happens when I quit KDE: I can see Gnome wallpaper and icons flash for a couple of seconds.
* I'm not using GDM or KDM, I start KDE manually.
* KDE version is 3.2.1
* Gnome is 2.4.2
* Distro is Gentoo
* I'm sometimes running GTK applications