I use Windows 7 + UFraw to process my RAW/PEF files from my K100D Super and now K-7.
I've shot some 20,000 RAW with my K100D, not a single corrupted file.
I have only shot about 350 RAW with my K-7 and I have 25 corrupted files.
Its probably not my memory cards because I get random corrupted RAW on both 4GB Transcend SDHC Class 10 cards. I bought them in May '10, they've only seen about 4,000 photos apiece.
Error message in UFraw, Photoshop CS5, and Bridge- The photo IMGP0001.PEF is not a regconized file type. K-7 error- this image cannot be displayed.
I can't shoot models, flowers/macro, or action when the best shot has potential to be lost because of a corrupted file.
Settings- Program Automatic, drive mode is continuous shoot Hi, 0+/- EV, 100 ISO, AF is Auto, I shoot optically, and RAW. Lens used Pentax 50-200mm WR
If there is a way to prevent corrupted RAW on the K-7 in the future, please let me know.
For analysis, I have uploaded a few of my corrupted PEFs to Mediafire.
IMGP6984.PEF IMGP0298 (9).PEF IMGP0298 (48).PEF