I just upgraded our server from 5.6 -> 6.0.1-01. So far, mostly everything's been fine.
However, I just tried to authorize my wife's computer with the iTunes store (I had done so successfully in the past), and it just hangs with a "connecting..." message. This also occurs on another box on the network. However, if I use my laptop (which is hooked to the same ISP with a standalone router and different IP address) I have no trouble authenticating iTunes.
I tried disabling squid transparent proxying, but that didn't help -- and I can't find any port information about the iTunes authorization service, so I don't know what to open.
Anyone have any ideas?