Dealer installed 3.5.1 on 11-28-12 and only two things "glitched" to a moment but cleared on next drive. The message "remote parking sensor ON" appeared and stayed in the display until I got where I was going - drive home was fine. And trying to switch to SiriusXM kept going to HD radio. Again, once shut off it was fine when started again.
Other then that, everything appears to be working, and performing faster.
And the temp now shows in the top of screen, which it did not before (I've only had this car three months and it came with v3.0.2 in it). And the NAV once again shows the street/road I'm on when displayed in the quad boxes.