AVG blackhole exploit alert when visiting forum

Probaby connected with one of the ads but over the last day or two I have been getting this AVG alert whenever I visit the forum , using two different Pcs

http://img806.imageshack.us/i/mwsnap22120110226195528.jpg/

<moderator>

Thank you! Perfect - with screenshot and all.

It’s been reported to the higher-ups.

Appreciate it.

</mod>