Wow, I'm shocked about the AMEX situation, I didn't know the basic card had no protection.
Maybe there should be a "credit-card horror-story" thread just to give everyone here a heads-up. It's the reason I don't carry an MBNA card anymore, because I once had a dispute with a retailer, (I bought something brand new, never even took it out of the SEALED plastic bag, and tried returning it... and the store wouldn't refund me, they told me their return policy was 'clearly stated on the wall.' Yeah it was on the wall alright, buried beneath a ton of clutter. (It was a hardware store with tools hanging everywhere, including over the sign.)
Anyway, MBNA sided with the retailer, even after I detailed my story to them. I called back livid, but they wouldn't budge.
So I cancelled my account with them.
Just so you know, some credit card companies write it into their terms that they can also jack up your interest rates if you have a delinquent payment with SOMEONE ELSE.
And guess who is the first company who will jump on this policy? Yes, MBNA.