Here is a thread on Howard Forums which members listed out there problems with the recent ugrade, aside from my N95-3's mysterious shut-down, they also noticed:
* When sliding the LCD down to reveal multimedia keys, the screen rotates but no longer launches media player
* emTube no longer works, suspect a FL2 vs new FL3 Lite support reason
* Nokia Browser seems less stable, crashes more frequently (happened to me once)
* Firmware doesn't have "PC Suite Support" installed, I noticed it a couple of times myself, it can be easily fixed by pushing this via PC Suite under one of its menus
Overall, there are 10+ pages worth of people talking on the thread, I haven't seen any consistent problems; so those could just be random bugs in Symbian S60.