I have a Flash Animation inside of iFrame. And when I try to hide it, IE10 keep it displayed and overlapping other content.
<body style="background-color: #EEE">
Testing IE10
<div id="swfDiv">
<iframe src="swf.html" width="500" height="50"></iframe>
<br />
<button onclick="document.getElementById('swfDiv').style.display='none'">Hide</button>
</div>
<div style="background-color: #DDD">
This try to hide the animation, but it is not working on IE10. <br/> It works fine in others browsers and earlier versions of IE.
</div>
</body>

Update 02/08/2013
I found the same problem in Safari (5.1.7)

Apparently the best solution will be move it off the screen:
We can add this class on click to hide it, something like: