The nvidia drivers have finally been updated. This is a long-awaited upgrade for many of us -- it should fix the compiz/beryl black windows bug and also provide xorg 7.3 compatibility. The nvnews thread in the url field has more details. Reproducible: Always
A bit slow on reporting this bug no? The drivers were only available for an hour and half when it was posted... Either way, it's in Portage.
*** Bug 192993 has been marked as a duplicate of this bug. ***