Dunno if someone had this problem before, but here it goes: I'm using the last Firefox version (3.6) and also the last version of Flash. When I enter Nintendo.com the site works properly with all the flash elements and stuff, then I go to Youtube(for example) and turns out the browser freezes partially(Ctrl+Alt+Del resolves the problem) when I click the fullscreen button. The only way to resolve this issue is to restart my PC. I tested it also. It only happens after I visited Nintendo.com. Any ideas?