I'm not familiar with Paul's setup but he's a very clever and talented guy. If the jitter is just a few occasional pops, I'd check if any nodes are using a point reference frame (ICE attribute) instead of a poly reference frame (or a point normal instead of a poly normal). When sticking geo/particles to other surfaces I've found that the point reference frame is an interpolated result which can make things jitter on a deformation. The poly reference frame (or poly normal) locks to each polygon. I like the look of the point interpolation but when it causes problems I switch to poly.
Beyond that emitting from deforming geo can also cause problems. I would suggest using a static object to do all the emitting/grooming and transfer that over to the animated mesh. Not sure how you're doing it now.
