1. installed nvidia driver with opengl (~x86 to get the nVidia GL Desktop Effects)
2. after that i installed beryl following the wiki article the portage version. (no svn oder overlay)
i started beryl-manager and when i switch to beryl, my windows decorations disappear.
The wiki article named a fix for that problem, switching the rendering path to COPY
But when i do that, i can see the window decorations BUT my desktop looks very strange
like this:

hope somebody can help me

