Corrupted images on the memory card?

[PaulN]

Is anyone having problems with corrupt images on their memory cards? I've been getting them every now and then (once or twice every 2-3 months) and it seems to occur most often when I am shooting RAW and shooting as fast as the buffer can empty itself. In this latest batch, I lost 3 images in a row.

It may be a problem with the memory card, but I've had this happen on two different cards (1gig lexar, 512mb sandisk). I'm careful with the cards, they are always in the camera, in the reader, or in their protective case. With my DSLR, I've taken 15k shots, and never had any problems with memory cards.

If it is the memory card, what do ppl do? Throw them out and buy a new one? I'll check to see if they are under warranty, but I doubt it.