Quick use of mouse in tabbed layout makes xmonad enter a loop switching windows

What steps will reproduce the problem?
1. Switch to tabbed layout.
2. Open at least two windows.
3. Click (click and release left mouse button) on the tab of another window.
4. Before the newly selected window is rendered on screen, move the mouse down 
to the (still old) window.

Time between point 3 and 4 is about 200ms max in my computer (if you use the 
mouse fast or your computer is slow, the bug can happen very often, which is 
irritating).

What is the expected output? What do you see instead?
Xmonad should simply change to the newly selected window.
Instead, it starts to switch from the old to the new window in an infinite 
loop. The window-switching loop can be ended by clicking on one of the tabs 
(without reproducing the bug again, which means, clicking "slowly").

What version of the product are you using? On what operating system?
This is a Linux Mint.
$ xmonad --version
xmonad 0.8.1
$ uname -a
Linux ironstk 2.6.31-19-generic #56-Ubuntu SMP Thu Jan 28 01:26:53 UTC 2010 
i686 GNU/Linux
$ cat /etc/debian_version 
squeeze/sid
$ cat /etc/apt/sources.list
deb http://packages.linuxmint.com/ helena main upstream import
deb http://archive.ubuntu.com/ubuntu/ karmic main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu/ karmic-updates main restricted universe 
multiverse
deb http://security.ubuntu.com/ubuntu/ karmic-security main restricted universe 
multiverse
deb http://archive.canonical.com/ubuntu/ karmic partner
deb http://packages.medibuntu.org/ karmic free non-free

Are you using an xmonad.hs?  Please attach it and the output of "xmonad
--recompile".
$ xmonad --recompile
$
(the command doesn't output anything)

Please provide any additional information below.

Original issue reported on code.google.com by stenyak on 28 Jul 2010 at 8:59

Attachments:

xmonad.hs

codehenry / xmonad

Quick use of mouse in tabbed layout makes xmonad enter a loop switching windows #401