I have caused a strange and rare problem. I was using the Canon File Viewer Utility to convert a batch of RAW files to JPG (this is how I review photos as viewing RAW pics is too slow) Yet while the files were being processed, I accidently pulled the AC power on my external hard drive. After this incident, all the RAW files that were not already converted (most of them) have become unviewable/useable. I need to recover my RAW files, as when I try to view them I'm turned away with an "unable to create preview screen" warning. I can see the thumbnails, and the files are still there -- same size, basically untouched. Something is strangely tagging these files as unreadable -- I can't fathom what. I am using a Mac, OS X.3. Or perhaps I can recover the files from the original CF card? I have the CF card, I formatted the CF card after copying it over to the hard drive but have not used it since -- perhaps the data is still there but recoverable? (Doubtful as it was formatted by the camera -- not "deleted") Any wild Mac or Canon ideas on how I can make my Canon CRW files useable again would be great. Thank you!