I've gotten the end-call bug as well. Also, I've noticed my battery on this tanks more than it did on 1.1. Plus I notice my screen always wants to stay on. And, I've had several times where I manually set my display brightness, then when I exit and hit the power button to put the phone to sleep, when i re-wake it, it's the previous dim setting. you can test this by setting it on the dimmest setting, then putting to sleep, then rewaking. I learned the workaround for this was turning on then back off auto-brightness.
I've also have consistently had data connect issues on wifi. Even with turning off wifi and turning it back on, still has connection issues once it's been connected to wifi for awhile.
Screen seems more jittery, too. I remember reading about android being overly aggressive with clearing screen caches, tho I don't know the details, but that is what the behavior is representative of. Once I've scrolled a couple of times, it's smooth as butter, but not until I've established that short term cache.