Doesn't work with streaming on QT Pro 7.1.3
running on a MacBook Pro 17" (intel) with OS X Tiger 10.4.8 fully up to date. After selecting an icecast2 server with a VR stream of type ogg it displays the meta data and then just sits there. If you re-run QT and re-select the same URL it will play about 5 seconds of whatever was playing on your first attempt, and then go no further.
It's a high bit rate VR stream which at the lowest speed is about 100k, and highest of about 180k. Two channel 44.1k stereo. If you want to test with this stream it's at ....v2.netoldies.com:7990/netoldies.ogg.
I'd be happy to try or test whatever, or provide additional info if needed.
--Bill Blue