Sadly, I still experience phone reboots after the update. Prior to the update, my phone would reboot under specific circumstances, and it continues to do so after the update.
While connected to bluetooth in my car, if I received a text message while listening to audio my phone would reboot. There would be a 1-3 second delay between the arrival of the message and the reboot. If the text message came in and I was able to click on the message to open it, it would prevent a reboot from occurring. I did not experience any rebooting issues in any other circumstance.
Today, I received a message while listening to a podcast on my lunch hour and the phone rebooted. I hope that they can fix this issue as it is problematic in that once the phone reboots, I lose the message that triggered the reboot.