I just received my D50 earlier this week, lovin' it!! I purchased a Sandisk 8GB Ultra II PRO DUO 15mb/s from buy.com for $53. and just put it in my D50. NO error message, I repeat, NO error message, it did blink twice with the "accessing media" screen but gave me no error message whatsoever. I went through the menu and formatted the card, again, no problem, and ran a 10 minute record test at 24/48, no problems again. It shows 7h 46m 27s as far as remaining time.
Only one issue, is anyone else have a little trouble pulling out the card with their fingertips?? I had to use tweezers to grab hold of it with that access door opened up. I am looking forward to a field test with my new CA-14 cards and a CA 9100 this weekend...