I'm getting what looks like a comment fragment "-->" inserted in my site that's showing up through different themes. The default two themes that come with WP don't have it but the last two new themes I've installed both show this fragment in IE (it's still there in Firefox but it's ignored and not rendered there). If I view source on either IE or Firefox, I can find this comment code fragment in the page:
<!--END #secondary .aside-->
Any ideas how to remove this bug? Or is this a problem with both of the themes I've installed? I get this same comment fragment in another theme in a different area but still shows up right above the beginning of the main content.