Emacs giving me artifacts in GUI
 

I am using emacs for editing. The problem is that it is giving me a lot of artifacts on the screen. Like the cursor movement leave black marks all over the screen. Cursor is sometimes not visible after movement. If I use highlighting current line then it also leaves artifacts.

I found that KWin effects are the problem here. If I can somehow disable KWin effects only for Emacs the artifacts would be gone. Anyone can help me now please.

I am on openSuse 11.4 .