Never had this happen before. Received an MMS from a person not in my contact list, couldn't view the image - Messages would just close. I could see the preview, but had to press and hold, then save as (the image) down to my file system/gallery and then I could see it.

I am still having lagging on the feed screen, Twitter and in Mail - it hesitates, then it works just fine. Maps and Drive, it's taking much longer to lock on, and I've yet to move.

There's other places I've seen lag, but so far, it's keeping most of the same pace as PR1.1.