drragostea
What I have since done for test purposes was to undo all of the spybot immunisations, then delete all of the warnings in the Virus Vault, then carried out another AVG 8 registry scan - no warnings occurred.
I then reimmunised all items in Spybot, then did another AVG 8 registry scan, 30 warnings. Sent to the virus vault. Spybot now lists 30 software plugins no longer immunised. Removed the items in the virus vault, reimmunised all items in spybot. AVG again finds 30 warnings but this time I have left them in situ.
It looks like it's a false positive problem for AVG 8
Why did AVG see 90 in the first scan - don't know, perhaps some were left over from a previous Spybot version. They have never shown up in Spybot, AVG 7, Malwarebytes or Hijack. As you say until such time as AVG sort this out there is little to be done but ignore these particular warnings.