Mouse dead zone that makes it impossible to click?

Solution 1:

This is a known bug in Compiz, unfortunately it's not fixed yet but when it is it will be rolled out in an update.

Solution 2:

just to inform I have the same problem, a little (~20cm x 1cm horizontal) rectangle on the screen is affected is not always there appear after a while I don't know why

  1. I don't use unity
  2. I on ubuntu 11.04
  3. I have compiz working with emerald 0.9.4
  4. using gimp I clicked the screen until I surrounded the area then I did a red rectangle