Guess I spoke too soon. I took the card out to about three hours after the last post. I needed to do some re-partitioning and external backups.

I needed to insert and remove about 3 times to complete all the stuff I needed to do. When I tried to insert the last time, it didn't want to play nice. It took about 4 reboots (including a remove-the-battery one) and about 30 re-inserts of the card to get it to come up correctly.

During the process, of trying to get it to work, I re-inserted it into my Linux PC to verify that I hadn't accidentally toasted it at some point. It always worked correctly on the PC.

So, I feel comfortable saying that it is some kind of physical mis-match between the Nokia interface and the SanDisk adapter or between the SanDIsk adapter and the micro-card.

Microcard + FS adapter into PC worked flawlessly the whole time.

Once I got it installed and recognized, it seems to be working correctly. So, it isn't an (electrical?) corruption. It's an interface issue.

It worries me that I had 0 problems with this prior to today. One quickly fixed problem earlier today, and now much more effort to get it to work. Guess I am in the market for a new mini-micro adapter.

Pity nobody actually makes 16GB MINI SD cards (especially class 6!!)