You should fix that, not being able to test in IE one of the most used browsers in the world. Not a very good "web designer" then, eh. But how to fix it...I'm not sure I'm running IE 9 its looks fine, even in IE 8 mode, IE 7 mode a little different but still usable. One thing I did notice was the page was pushed down to the bottom quite a bit, both in Firefox and IE.
Remove "top: 50%" and "margin-top: -400px" from #vcontainer I'm going to guess that is the problem.
Logic without the fatal effects.
All code snippets are licensed under WTFPL.