http://www.icyphoenix.com/viewtopic.php?f=29&t=8075&p=54240#p54240
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Mighty Gorgon
Sun 16 Oct, 2011 11:56

Re: IE9 And Posting/Editing
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Unfortunately it is not easy to prevent that.

Usually browsers shows you some progress when submitting a form, while IE still doesn't give any prompt signal to the users (so they click more than once! :sad: ).

I think we can do very little to prevent this.