It is indirectly related to direct rendering being available: when you're using Xgl, clients under Xgl don't get direct rendering.
On your GeForce 6200 you're not using Xgl, so you obviously don't see this Xgl bug.
It is indirectly related to direct rendering being available: when you're using Xgl, clients under Xgl don't get direct rendering.
On your GeForce 6200 you're not using Xgl, so you obviously don't see this Xgl bug.