Comment #2 on issue 2879 by jaffathecake: Implement fast back
http://code.google.com/p/chromium/issues/detail?id=2879

Many JavaScript libraries add a listener to the window object's unload  
event,
negating the effect of back/forward cache as the unload listener may have a
destructive effect.

Libraries use this to clear event listeners for IE (to prevent leaks), but  
also
because some browsers don't fire mouseout events as the page unloads,  
meaning when
the page is returned to, some elements may still think the mouse is over  
them.

Would be interesting to see if you guys can come up with a solution to the  
above.
Possibly by a combination of delaying unload until the page is removed from  
memory,
and firing mouseout on the element the mouse is currently over before the  
page is
removed from view.

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