KDE4 on Solaris 10 Update 4, built with Sun Studio 12, BOOST 1.34.1, QT 4.3.1 and the Apache Standard C++ Library,
running on my Opteron box.

S10U4 Xorg 7.2 is running with

Option "AddARGBGLXVisuals" "True"
Option "AllowGLXWithComposite" "True"

and all the other X Extensions (XRENDER, XRANDR, XComposite, XDAMAGE) on a nVIDIA Quadro FX 3500.