Re: 1.0-8774 crash Xgl...
Same problem here, I just fell back to running apps on :93 instead. It's a pain, but new drivers should be coming soon which will negate the need for :93 or another x server to run 3d apps/games.
Edit: For fullscreen games/apps, if you want to switch back to XGL, I'd recommend temporarily launching a window manager on :93 so alt-tabbing becomes viable. Just watch out for alt F4 when you're doing this, as the window manager will intercept this and nuke XGL, treating it as a window.