I've noticed that when playing audio over a headphone jack, the audio has huge stutters - as in it will stop for three or four seconds, play a tench of a second of sound or so, then go silent again - when the display goes to sleep. If I press the button to wake the display, the sound resumes playing normally.
This does not happen over bluetooth. I think it may be a bug in the power management, but I don't know where to go from here to debug it.