Strange desktop behaviour when using openoffice

Hi just installed opensuse 11, never used suse before or kde.

I have had some small problems, but nothing i couldn’t solve myself. except this one.

every time i use openoffice, the kde4 menubar especially the clock, starts to blink, and when i select the menu, it looks like the screen is not updated where the menu is. i dont use desktop effects, but i have installed the nvidia driver. any idea what I can do