When switching between applications or desktops, the on-screen preview is always messed up if I'm using OpenGL for compositing.  It has been like this for as long as I can remember.  I'm finally getting around to notifying you of the problem.

I will attach a couple of desktop recordings shortly.  In them, you'll see that I attempt each maneuver with OpenGL and then XRender.  The problems only occur in the former case.  Also, it makes no difference whether I'm using OpenGL v2.0 or v3.1.

If you'd like to know any aspect(s) of my system, tell me which command(s) to run in order to get them.  For now, I will say that I'm using an Intel graphics card and that KMS is enabled.  These are the only rendering problems I'm experiencing.