Since switching to V6, my signature.db3 file seems to be the same size as it was in V5, and the date on it is the current date, but its performance in stopping the downloading of files that were already downloaded under V5 is spotty. It seems to stop some, but not others. I've verified that the files are identical, byte for byte.
Is there some kind of conversion from V5 necessary? Also, how big is too big for the signature file?