I can't reproduce it on any games in the Arcade. Does anyone have any issues playing Arcade games in IE9? I think it might be a problem specific to previewing (which is good if so, it's much less severe than not working at all).
Same here. Good point then.
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I only have the issue on Preview not when actually running the game...?
OK, I guess an acceptable workaround for the time being is just to use another browser when previewing, and IE9 will work once you've exported, it seems.