URL:Blacklist false positives?

This morning I am getting warnings about several website I administer. 'Threat secured - we've safely aborted connection on URL:Blacklist because it was infected with www.domainname.com'

I have checked the sites in question and there is no sign of any instrusion or malware on the sites - they are all sites that I have worked on recently or had open in a browser for an extended period of time.

Also the warning insists that the site is infected with its own domain name - which is curious as usually it is the other way around - aborted connection on 'domain name' because it was infected with URL:Blacklist

Pop up warning picture attached:

Hi Scott,

Thanks for posting your query in community forum.

As the detected URL is false positive, I suggest you to submit the URL in the below link for analysis.

http://avg.com/false-positive-file-form

After analysis, our higher level support will contact you via email regarding it.

Hi Scott,

Thanks for posting your query in community forum.

As the detected URL is false positive, I suggest you to submit the URL in the below link for analysis.

http://avg.com/false-positive-file-form

After analysis, our higher level support will contact you via email regarding it.