I have a 4GB Class-4 Kingston SD card for use with my Polaroid i236, and it worked like a charm. It was fast, and earlier today I took three photos and it worked. Just now I tried to take a picture of a dragon fly who nestled himself on my window and it went straight to camera flash memory. It ignored the card's existence. "No problem," I thought, removing the card and cleaning the connectors, and the slot as I slide the card back in only to get the same result. Annoyed, I toss my card onto my desk and slide it into my computer's built-in SD slot. Reads fine, transfers fine, so I format it. Still works fine. I slide it back into my camera, same result. I try a different and older SD card that's too small. A Lexar 128 MB SD card. It read that, as I watched the "Memory Full" bar appear on my screen. I tried to Kingston again. Same result. By now I'm remembering a few flash drives I've had from Kingston that did the same thing if not give me other problems such as completely losing valuable irreplaceable information. So what is my issue here? Am I doing something wrong, or is Kingston the garbage I'm told they are?