Maarten Lankhorst released a stable xf86-video-nouveau X.Org graphics driver update today for the reverse-engineered open-source NVIDIA support.
The new xf86-video-nouveau 1.0.3 release is primarily about pumping out fixes. The updated Nouveau DDX fixes a segmentation fault within the ShadowFB support and then fixes that affect DRI2 and EXA.
Details on the Nouveau X.Org driver point release can be found from
the mailing list announcement.