Didn't want to hijack the "Banks calling you..." thread but "they just don't get it" is spot on.
After trying twice to pay for an online purchase with my Abbey credit card, which each time took me to its 3Dsecure site then declined my credentials, I gave up and used my MBNA CC. Then phoned Abbey to ask what's going wrong. Got some flannel about why my 3Dsecure password might have got borked, got it reset, logged onto their site and changed it to something I wanted ... and while I was there had a look at my recent receipts. Well fork me if there aren't the two payments to the online retailer that were supposedly declined about half an hour earlier!
Back on the dog to Abbey, what's going on with these transactions? What transactions?, they ask: they can't see it on their system anywhere. Meanwhile I've still got the web page up (so I'm pretty sure it's not the drugs kicking in, but I take a copy of the page just to back me up :-)) so I ask why I'm seeing them on their web site. Oh don't worry about it, it's probably just a technical glitch, we're sure the money hasn't been taken out of your account (so go away and stop bothering us). But isn't your website - and presumably some part of the online banking infrastructure behind it - being broken kind of a problem? Evidently not.
So who should I get my next credit card from, when I dump my Abbey card?