There's an obnoxious <hr> element added into the zenphotopress widgets that I had previously hidden using css. After rehauling my website, I wanted to make sure I was still XHTML 1.1 compliant (I know, I know, standards compliance isn't everything). The <hr> that the widget adds is apparently in the wrong place. Does it even need to be there? I noticed from the screenshots that it doesn't seem to have always been in the code. I just removed it, but if I ever upgrade the plugin, I'm assuming that will get overwritten, and I'll have 'bad' code again.