Okay, so running an effect on pan and I have been noticing stuttering about mid way through the sine wave every time. A light (haven't seen any discrimination on fixture types) will be panning from left to right in a focus effect. When it gets to about the middle of the travel, it will ever so slightly stop and restart, again it's very quickly, but it looks pretty bad to someone like me anyway.
I'm not running the effect fast or anything. Just a nice gentle back and forth but I see it every cycle.