Vista problems - IPv6 related?

I'm having trouble running OSControl and Braun (mentioned on the front page) under Vista. Braun crashes whenever it receives an OSC message, and OSControl won't connect to a host, with the message in a box: "The requested address is not valid in its context". Is it possible that these are related to IPv6?

If so, does this require a revision to the OSC spec, making IPv6 support mandatory?