Doing a little research and this appears to be an issue on several websites, banks, istockphoto, etc. Apparently, you have to add some websites to the compatibility mode list and restart the browser.
Another solution is to add this to the list of meta tags:
<meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7" />
Still doesn't really explain why it's working for some and not for others, but that's what I've found so far.
