When using current git (master branch, f48087b6c33c1f84bf2cfc0744b1c38697321c07) version of xserver auto repeat (not all, only those from auto repeat) keyboard events are delivered not only to window with focus, but also to window with mouse over it. If it's the same window auto repeated events fire twice as fast as normally. Steps to reproduce: 1) Use fluxbox or TWM (I don't have any other WM to test). 2) Focus one xterm with a mouse, switch focus using keyboard to next xterm. 3) Press some key, wait and be amazed. ;)
*** This bug has been marked as a duplicate of bug 13114 ***
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