It's probably worth noting the Eric happened to have revised SpamCopURI recently also, to version 0.21. Perhaps more importantly several people have tried SpamCopURI 0.21 with SpamAssassin 2.64 and they seem to work just fine together.
One problem: SpamCopURI doesn't patch the SA perl modules, it replaces them. So any changes in PerMsgStatus.pm or Conf.pm between SA 2.63 and SA 2.64 will be lost when you install SpamCopURI.
Kelson Vibber
SpeedGate Communications <www.speed.net>