Last time they froze my account (the only time actually), it was unfrozen the next day with a quick phone call and the lady was very comprehensive. Apparently,

Last time they froze my account (the only time actually), it was unfrozen the next day with a quick phone call and the lady was very comprehensive. Apparently, that's the sort of thing that happens when you register your 10th credit card for the year. I guess I can understand the reason, even though it's annoying.