I’ve found a number of sites where AVG hasn’t updated defs since 10/6. This is apparently a known issue (see text from forum post below). Please be informed that there has been a technical issue with publishing of new updates, which is our technology and development departments recovering back to working state (and avoid the situation in future). Updates for AVG 2012 has been recovered yesterday in the evening (CEST). Next will be AVG 2011, then AVG 9.0 and AVG 8.5.
Hopefully they’ll get caught up soon.