Ok, there's a little issue with MSIE, as usual it doesn't handle dimensions correctly. So there's no scrollbar, instead it's displayed in full, streching the page a lot.
A quick fix is to edit the 'attbrs_attachment' template and change the div in the 2nd row to:
Code:
<div style="overflow: auto; width: auto !important; width: 800px; margin: auto;">
This will give the browser a fixed width of 800px in MSIE only.