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If I understand you correctly, the icons in the Affiliates block don't display in a center position. Well I watch your site with Internet Explorer6 and these images are in the center.
Probably other browsers display it wrong. Make sure your html code meets the w3c standard to avoid these problems (allthough some browsers don;t even display the w3c code correctly). I use
http://www.w3schools.com/ to get more information about html meeting the w3c standard.
BTW, the <center> tags aren't allowed any more. Try to use something like this:
<table>
<tr>
<td align=center">blablabla
good luck