I faced two slight issues with my nexus 4.
1. I was not able to record video, I pressed the red recording button no response - switched off n turned it on - worked fine.
Again today there was the same issue, not able to record, turned off and on - it's been ~5 hours observing it and it's seems to record now.
2. I'm using the Slide as Security Option - Plugged in the earphone - Play Music - Removed Play Music from the Q. Then use to listen to songs - if I unplug the earphone and click the power button to unlock the screen - the screen sort of shakes.
Anybody faced these issues?