So, I've just confirmed this problem on a MacPro with an 8800GT card as well as a MacBook Pro with built-in 8600GT.  The symptom is that glxgears claims high frame rates but does not actually animate with any speed at all (maybe 1-2 FPS).  With the shipping Leopard version of the X server, the same demo flies.

- Jordan

On Feb 25, 2009, at 6:10 PM, Jeremy Huddleston wrote:

Aside from the server change, this release is almost the same as the 2.4.0_beta1 release (meaning all the client side updates are still present).  The only change outside the server is for libpng.  libpng has been updated to address a security vulnerability (another reason I want to get out another stable release).  See the draft release notes for full details:

http://xquartz.macosforge.org/trac/wiki/X112.3.3

The dmg for the release is here:

http://static.macosforge.org/xquartz/downloads/X11-2.3.3_beta1.dmg