i think i’ll have to try this out on a fresh WP install, but i’m not clear looking at the themes code and your site. has your theme been customised?
first off, is the widget you are talking about the ‘google adsense’ under the recent comments gravatars? that’s the 4th in a mini sidebar of polls/tags/recentcomments/adsense/now-reading.
the UL for that sidebar doesn’t have an ID, and though the theme sidebar.php ends
</div><!-- end sbwidgets-->
</div><!--end sidebar-->
this sidebar is between those two comments. so i don’t know what’s going on there. there’s nothing unusual in functions.php that could be messing things up either.
like i say, it might be clearer if i try to install it on my local LAMP version at home. will let you know if anything obvious jumps out at me.