Whether I try to upgrade some of my music to the new iTunes Plus format, or buy something new, I just get this:
It can wait.
[update: I can’t buy anything at all; my account is now thoroughly confused in their database.]
[update: okay, it took a week, but they figured out which Dean Martin album shouldn’t have been trying to upgrade to iTunes Plus, and with that out of the way, I could determine that the season pass for The Dresden Files (not as good as the books, but not bad) was also broken]