Recently I've experienced a rash of these. Here's what happens. I shoot RAW with a Canon 1D MKII, image displays correctly upon review in LCD screen, insert memory card in USB reader, open RAW file with Camera RAW converter (latest version - also use Photoshop CS2), thumbnail displays correctly in 'open' window, in Camera RAW the image at first draws correctly then quickly re-draws creating some version of the example below:
This does not happen all the time but most recently I lost 15 out of 70 images shot in one day last weekend. Frustrating!
Suggestions from folks have ranged from a faulty DIGIC processor in the camera to inadequate memory power in the computer. Only images with a small amount of this effect (like the one above) can be converted and opened in Photoshop. The others trigger the equivalent of a 'file not recognized' error.
Any thoughts? Thanks in advance for your time and interest.