Photoshop is not recognizing the file format on my memory card. I shoot in the RAW format on my Canon 5D MkIII, I am using the latest Photoshop with the latest updates. Can anyone throw any light in this probem.
I'm also finding a lot of things about your camera model not being able to open raw files from your camera model in CS3...which I know is not your problem, but, it's interesting that there has been issues with your camera model in photoshop before. If you have lightroom I would try importing it there as well and seeing if it works.
I hope this helps... Like I said I'm not the biggest expert on this but hopefully I was able to shed a bit of light on what the problem may be, or at least give you things to rule out if those aren't the issues