Charon external judges flagged as trojans

Yesterday my AVG anti-virus suddenly started flagging some of the external judges that came with Charon as Trojans.

I removed them from Charon (just to be on the safe side), but now I'm wondering if I might have too few judges to accurately determine the anonymity of the proxies I'm testing.

Anybody have any min/max values for number of external judges from their experiences with running Charon?

Use Internal Judging.

Also: If you're using External, there's no sense in adding more than 2 to the upper "actual use" list, beyond that it's sort of counter-productive. Two is just in case the first one falls off.

N