I know there's been a ton of posts about this, and the information posted and expressions shared have been wonderfully helpful.
That said, I am working on an end scroll that seems to have a slight (very slight) stutter, and I'm wondering what may be the cause. The scroll moves in whole pixel movements per frame, and still there's a slight stutter. Perhaps this is the playback and not a real issue?
Low res looked pretty good. I saw a couple stutters, but figured it was playback related. Try a lower res file to see if that was it. Beyond that, make sure you're not accidentally incorporating duplicate frames by doing something like working in 24fps and rendering to 30fps.