Steps to Reproduce:
1. Open gedit or gnome-terminal and launch glxgears.
2. Switch to overview mode.
3. Select gedit or gnome-terminal window there and start type something.
Typed text isn't shown until you close glxgears
Typed text is shown immediately.
I'm not sure it is a focus transferring issue or more general problem with performance of my machine.
SW: testday's live image x64: http://adamwill.fedorapeople.org/graphics_test_week_20110905/graphics_test_week-20110905-x64.iso
*** This bug has been marked as a duplicate of bug 720605 ***