PS: With linux-rt and the radeon driver real transparency as a desktop effect does cause slow motion when moving windows. Fortunately I don't need it, I even don't know, if the WM I currently prefer does support real transparency, or even faked transparency. It's Jwm. Google Earth does work well with both, nouveau and radeon, but I've got the impression, that it's a little bit smoother for the NVIDIA card.
