If you have ever seen this issue and pulled your hair out trying to figure out why it happens with some users and not others, fixing it is embarrassingly (now that I know) easy. Change the zoom in IE back to 100%!
Take a look at the bottom right area of IE. If you see that the zoom is NOT 100%, select the View / Zoom / 100% menu.
Hopefully this will save you some time if you ever run accross this issue.