When I view this site on Internet Explorer 11 (running on Windows 7), everything renders fine. But when I start scrolling, I get the following:
As you can see, several horizontal lines appear in the previously hidden area that are the same color as the side borders. This does not appear on any other Stack Exchange site that I regularly visit, nor does it appear on Travel Meta.
I'm not sure if this is an issue with just me or if all Internet Explorer 11 users have this problem, but I figured I would bring it up just in case.