I actually don’t have Internet Explorer (I don’t own any Microsoft products). I usually have someone that owns a PC check everything before themes are released to make sure there are no bugs.
I’ve never heard of that issue happening so it could just be a problem with your css. Double check any custom code that you’ve added to see where the issue is coming from. Internet Explorer should have developer tools, so you can use that to inspect the code.
If there is anyone out there with access to IE8 can you please help us out?