http://majorgeeks.com/SUPERAntiSpyware_Database_Definitions_d6303.html
was blocked by the latest Avast Free (Windows version, inside Win7 running on Parallels on my Macbook)
Not really a surprise or really a false positive, you are downloading virus signatures, which would appear to be unencrypted and you have installed a resident anti-virus just looking for said virus signatures.
A bit like an attack dog biting a burglar.