I have installed openSUSE 11.1 from KDE 4.3 live CD.
I has k3b K3b 1.67.0 installed by default, but it is too buggy so I have removed and installed K3b 1.0.5 (QT3) version.
But now openOffice changed look from GTK to QT3 
How to fix it?
barely noticed the difference 
Well I’m more intrigued what caused the change but as I don’t know that…
You have two ways to fix this locally or globally
Locally edit .bashrc
export OOO_FORCE_DESKTOP=gnome
Globally similar but you need to create a .sh file at /etc/profile.d/filename.sh with the content and make it executable.