would help if you posted a snippet of the containing div or whatever.. then it's possible to see if there are any IE specific rules in play
<a <div style="text-align:center;"><img src="http://i280.photobucket.com/albums/kk193/carolinasoutdoor/COBanner.jpg" border="0" alt="COBanner"></a>
</div>
Heres what I got, its fine in Firefox. Its probably a miracle it works anywhere.