Well, I still think it's just a bad card. **** happens, what can I say? It's very unlikely that you'd get two in a row, but it does happen. As long as they'll take it back, I'd definitely take that card back and get another.
As they say, third time's the charm.
And if it does fry a third time, well, then you have a problem. It would almost certainly have to be a bad motherboard/AGP slot.