Okay, I'm now going to kick myself.
When my X1900XT failed out of warranty and I replaced it with a 3870, I threw out the 1900.
I wish I had known about this; I could have gotten the 1900 replaced and had a spare video card. Curse my trashing ways!!!!!
Apple KB Article says "If you believe you have paid for repair or replacement due to this issue, contact Apple regarding a refund." - give them your mac's serial and see what they say.
Excellent, I've still got mine & yes it did go wrong.
Does anyone know if they will replace it with another X1900 XT or a different card?
Thats not a recall, and bringing in your card simply for a replacement if its not faulty is just wrong.