Judging by the current rash of posts on this issue, all with AVG, I expected that this was a false positive and this post from the AVG Forum:
please be informed that false positive detection "HTML/Framer" (www.google.com/recaptcha/api/js/recaptcha_ajax.js, BrowserCompAp.js) was already fixed with latest virus database update 271.1.1/3006 released 7/15/2010 6:44 AM CEST.
Please update AVG virus database and check the websites once again.
Apologies for any inconveniences.
proves it. Update to the latest AVG definitions and it should go away.
This is the second time AVG has had this same false positive. Last time was back in 2008.