Re: Get pauses in q3 and weird glitches with XGL
You don't need to use either XGL or AIGLX with the nVidia drivers. They expose the necessary features for compiz and beryl with direct rendering.
Secondly, even if you're running Q3A on the non-XGL server, you're graphics card is still doing all the processing for XGL and beryl/compiz. That's a whole lot of overhead.