I too recently had this same problem then it just went away without any changes on my part.
http://www.rcuniverse.com/forum/m_11...m.htm#11192936 Now it comes back from time to time, I have to disable the link scanner. I contacted AVG and was told that it was not an AVG error. I still don't know what to think. It does not happen on any other website except RCU.