Hi,
First, I would like to check whether IE is using compatibility view. If so, to disable compatibility view in Internet Explorer 9, complete the following steps:
1. Open Internet Explorer 9.
2. Click Tools and you will see an option called Compatibility View.
3. If there is a checkmark next to Compatibility View, click it to remove the checkmark.
More reference about Compatibility View,
How to use Compatibility View in Internet Explorer 9
http://windows.microsoft.com/en-us/windows7/How-to-use-Compatibility-View-in-Internet-Explorer-9
Hope this helps.
Vincent Wang
TechNet Community Support
