It sounds like this may be a disagreement between your browser and our CSS. Internet Explorer 7 isn't a final release and isn't fully supported.
Microsoft offers some suggestions on how to solve this type of problem with IE7 here: http://www.microsoft.com/windows/ie/s... They might not help, but if you try them, let us know how it goes.
The icon looks a bit like a flying saucer or a chain link. On your post of 3 hours ago it is just to the left of about 3 hours ago.
Is this what you click on or do you click on reply? Reply would seem logical (obviously), but the icon seems to work better.
Guess one of the differences is when you click on the icon it just says replied, when you click on reply it says replied to