Is the iTunes store having its own credit crunch?

Credit crunch hits Apple?  Not likely with that $28 billion in the bank.  But there seems to have been some problems affecting people’s iTunes store credit.

According to Venture Beat and a few hundred Twitterers, there seems to have been a minor glitch when purchasing videos or music.  The error reads:

Due to a problem with the iTunes Store, your store credit balance is temporarily unavailable for use in purchasing music; you may continue purchasing using a different method of payment.

As of this writing the problem appears to be solved.