penders - 10:29 pm on Feb 18, 2012 (gmt 0)
"yes-repeat" is an invalid value.
Actually, I'm not convinced that this is the source of your problem!? I just did a quick test and both Chrome and IE (versions 6-9) correctly ignore this value.
[div id="page-bot" class="c28" style="background-image:url('images/footer_bg.jpg');">
I've just noticed, but maybe this is a typo(?), your opening DIV tag is malformed.