I like to share this with you,and i wish avast have no xss vulnerabilities
http://www.hackinthebox.org/index.php?name=News&file=article&sid=38300 :o
also on Kaspersky
Hacked Kaspersky Download Site Directs Users to Fake Antivirus
http://www.pcadvisor.co.uk/news/index.cfm?newsid=3244872
also see Omid`s blog, very good lots of info
http://boelectronic.blogspot.com/