Re: AIGLX and CPU consumption
with nvidia, you don't need AIGLX. nvidia has its implementation of tex_from_pixmap as GLX. thus on a nvidia card, using aiglx will makes it tex_from_pixmap in software, whereas with intel cards, the driver being opensource, they may have made it accelerated even with AIGLX. using GLX with nvidia will make tex_from_pixmap accelerated again, with currently a few caveats (see black windows topics).
to nvidia forum mods/devs, this should be made clear once and for all, you should really make a sticky with clear title explaining that AIGLX != nvidia tex_from_pixmap. that will clear up many doubts in term of feedback, as more people are thinking that ( compiz & !XGL ) => AIGLX, even with nvidia.