hey mark, oggamp~, shoutcast~ and oggcast~ works fine for me running max 6.1.2 on osx 10.7.5.
for a current audio streaming project i used olaf´s object on a win 7 computer.
so, maybe you have an outdated version, or multiple versions of the objects in your searchpath?
the best would be to contact olaf directly … he is a kind guy and will help you.