I got the same thing, here is a mini-screenshot of it:
All I can say for this is: If you're so sure its not really a virus, send it to Analaysis
Open AVG->History->Virus Vault
Click on the virus, and send it to analaysis, they can see if its really a virus or not.
EDIT:
I just tried to send it to analysis, 3 times, and it kept saying sending failed. Heres the screenshot:
(why is nothing showing, I really dont know)