There is already an active thread on the subject of corrupt memory cards, and how to recover the pictures. Here is a link to that thread:

http://reviews.cnet.com/5208-7593-0.html?forumID=58&threadID=213355&messageID=2281544

A precaution...
Anytime you put a new memory card in a camera, you must, must, must format that card using the camera.
This conditions the card to match the camera.

Failure to do that, is like setting a time-bomb.

Using a card reader (like the one on your printer) is OK. But never format the card from the computer. Only format the card using the camera.

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