dazzlindonna - 2:47 pm on Aug 23, 2011 (gmt 0)

I'd check for evidence of hacking. Use WMT's Fetch as Googlebot to see how Google sees it. Look for hidden text, hidden links, redirects, or any content that you didn't put there - but seen only by Google. If none of that pans out, double-check that you haven't blocked Google via robots.txt, and then finally, go back through Google's list of things not to do, and make sure you aren't doing any of them.