I am also seeing this problem. My setup uses focus follows mouse, and I often see screenborders drawn in the forground of opaque windows until i move the mouse in or out of the frame causing it to redraw. The system has an nvidia 7600GT video card and is running 8.10 and KDE4 current with that release. This looks like a bad interaction between the video driver and the compositing window manager, to me at least.
I am also seeing this problem. My setup uses focus follows mouse, and I often see screenborders drawn in the forground of opaque windows until i move the mouse in or out of the frame causing it to redraw. The system has an nvidia 7600GT video card and is running 8.10 and KDE4 current with that release. This looks like a bad interaction between the video driver and the compositing window manager, to me at least.