Okay, had a little more time tonight to try and figure out where things were going wrong. It looks like it's in whatever is being referenced in the local stabilization part of the script. If I comment out all of that section (apart from the Source, Sigma, and Filt lines) the problem is gone. Can someone give me a clue as to what needs to be replaced on my end in that case? Various generations of MVTools didn't seem to solve the problem at all (tried .9, .9.9.1, and 1.4.4.4.1). I installed the plugins as a single batch put together for this script, and I'm not sure what I'm looking for; MVTools of yet another version, MVAnalyse, RemoveGrain, Median1, or something else entirely?

As for Rejig, I also had trouble with it. I went through IFOedit intially, which worked, but ended up putting the whole thing together at work in DVDLab Pro, as I also added a couple of original teasers, trailers, and the ISOMix score-only track and needed a new menu.