I've never ever had a problem like this before. I was shooting a runner's race today for a major national event outfit where they give you the media to put in your camera. Didn't think anything about it, just picked up the CF and tried to insert it into the slot in my D300. Oh boy. Rut roh. It would not seat. I thought perhaps that I had it reveresed some how...so I looked at it and tried it again. It still would not seat on the pins. So I pulled it back out and looked at the CF card and the dang CF card was actually bowed in the middle. Yes, the card itself was deformed! Never seen that before and I am SO GLAD I did not try to force it onto the pins. Averted major disaster. Anyway, wondered if anyone else had ever had anything like this happen to them?