I have to say that since the OTA firmware update, the stability of my D3 is ... still the same.

That is, in general, it tends to reboot itself every 7-10 days, like before the firmware update. However, last Sun., it was by far the worst. I went to a football game and had GPS on and took plenty of pics and vids. It rebooted on me 3 times when just doing something simple on the phone, like taking a pic, texting, or surfing the Web. It held that last screen for a few min., then rebooted itself and the phone was functioning normally.
The 4th time, I took a pic and the camera app died. I went back in camera mode, it showed the last pic, and then froze there. I waited for at least 10 min. or so, but it was still frozen. For the 1st time since I got my phone and inserted the case, I had to take the case out, open the battery compartment (PITA, but the credit card trick works well), take out the battery, then put everything back together and reboot the phone. Everything was fine after that, but very annoying that the power button doesn't work when the phone crashes.
BTW, I've never had the "BP paniced" error other than the 1 time when I started this thread.