Re: Fickle idiot gamers
"Ummm....you SHOULD be worried."
Yes, if this had been a hack by malicious people and my card number and address were splattered all over the Internet, but it wasn't, there were no hackers/malicious persons involved.
It was a system balls up, which means if someone out there was lucky enough to be issued the same session ID which matched my cached session ID, they *may* have seen my address. This is a very low possibility, and even if they did, they're more than likely just going to whine to Valve about it, since they loaded Steam to play a game, not steal identities. So no, not too worried.
And I did say: "I'll probably get a new card ordered to be safe." - but this to me is purely a precautionary measure, I don't feel it's a requirement given the conditions around the bug.