Apple ID does not work in iTunes
I bought a song earlier tonight. That worked fine, but since then, when I try to access the iTunes store, iTunes thinks about it for about 2 minutes, then either says that my Apple ID or password is incorrect, or it says that the network got reset.
I went to another computer in the household, and I got the same results.
As far as I can tell on the My Apple ID web site, my account is valid and in good standing.
Why does it not work in iTunes?
When I look for software updates for iTunes, it says that 9.1.1 (the one I have) is the latest. Maybe so for PowerPC macs running 10.4, but my late 2009 iMac running 10.6.4 has iTunes 9.2.1(5).
PowerMac Dual G5, Mac OS X (10.4.11)