I've just installed windows 8 and it comes with IE10 and flash 11 , I use two displays (extended dektop mode) when I want to play something like an you tube video on display 2 and if I want to make it full screen it makes it full screen on both displays and it freezez and flickers. I've already verified all the things displayed by adobe on their flash support for windows 8 page and I've updated my video card driver from Nvidia stite .
I think is an IE 10 problem because I have tried opera and firefox and on both of them playing a flash video full screen on display 2 works fine, a temporary solution is to use another browser for this but I like IE and I would like to do all I need within IE and not other browsers .