The M9 seems to work OK most of the time, but then it freezes after taking a photo and the red card activity led blinks for 30-60 seconds. The camera is totally frozen, event the power off does not do anything. Then it seems to start working. It takes pictures normally, but the pictures are zero kilobytes on the card.
The pictures that are taken before the 30-60sec freeze are OK, but anything taken after that are 0 KB on the card.
The worst part is that the camera seems to work, but I loose all the photos I take.
It has done this now 5 times since the firmware update.