I don't understand why this topic brings so much heat, the thread at Fedora forums isn't exactly heartwarming either.
For more info, here's my last post over there:
I actually tried a couple of other OpenGL demos before to verify the problem and saw the same thing. But just to be nice, I tried Glaxium. Got the same result, decent frame rate (almost 500) but pretty horrible stuttering.
Oh, and the stuttering occurs even if I use an xterm only session.
The pesky thing with this "bug" is that it's pretty hard to figure out where it comes from and I thought somebody here maybe could have an idea what I should look for.
EDIT: About why I care about glxgears stuttering:
Something is obviously wrong in Fedora and I want to know what. Simple as that.