id3v2.3 multiple genres?

[CyberWilhelm]

Hey Simon, thanks for the reply!

Huh. So there's no way to chain multiple text values without specifying an ID3v1 genre number as a separator?

As a quick test, I just tried using "(0)Rock(1)Christmas" for the TCON frame, and it looks like minimserver wrote out the following:
GENRE=Blues
GENRE=Rock(1)Christmas

Separating the two with a space doesn't help, either. I would have expected:
GENRE=Rock
GENRE=Christmas

Granted, misusing the ID3v1 genre reference seems like asking for trouble, anyway. I tried using an undefined reference value, but just about everything seems to choke on that.