Just put my Micro SD from my 6275 into my N95, and it's asking for a password. I tried all my usual ones, including the nokia defaults. But no joy. The net seems to tell me to download a file manager, then search for mmcstore, which I can't find on my laptop at all, or searching through the phone.
It's not a huge issue, but thought I would my spare one in my girlfriends camera, the one that came with the n95 works perfectly. Seems like a waste though.