I'd say that it's because you woke up a sleepy account, and possibly you had one more account reporting a balance than usual.
What negative remarks did you get on your FICO score report? Or at any rate, what remarks did you get that were different from your last score report for the same CRA?
* Credit is a wonderful servant, but a terrible master. * Who's the boss --you or your credit?
FICO's: EQ 781 - TU 793 - EX 779 (from PSECU) - Done credit hunting; having fun with credit gardening. - EQ 590 on 5/14/2007