Recordbox 2.0.2 Jittery waveform on playback on a PC

Anyone else noticed a jittery waveform when playing a track in RB on a PC?

It runs for a few seconds, then sort of pauses for a few milliseconds then carries on. This then repeats. There's no audio interruption.I've tried it on several tracks. All all 320 analyzed with Platinum Notes and imported. Even gone to the lengths of creating a new db.

I'm running it on Win7, I7, 8GB Ram, SSD HD. No other programs running, AV stopped and not using Link. Can't see anything in the task manager/resource manager that could be causing this. Latest graphics drivers are being used. Looks to me like it's some internal RB resource problem.

Or is this just me?