1)  My battery doesn't last a day w/out my car-charger, and my usage is pretty normal: texting, checking email, photos, and an avg of 15-20mins/day talk-time
2)  Delayed response after touching icons for text notifications, and new emails... VERY delayed.  Sometimes up to 6 seconds.
3)  Texting multiple recipients (5-9) freezes the text messaging window after touching send.  I wait a couple mins, then swipe it closed.  I check mssg history to see if they sent, and it doesn't.  I have to re-type the msg and send in batches of 3 recipients.

Are these problems common?  I brought it back to the store once and they said because it does so much, sometimes there are glitches.