Well, it took me over two hours (and I actually finished the book I started yesterday because load times are SO slow!) and I never did see the error again. However, I ended up culling most of the crap that was in my MTS2 folder, keeping only the important stuff so the offending file probably got dumped.
But here's my next problem: I had the Traveller family go on a helicopter ride (to reward them for being my guinea pigs during load/re-load, etc. LOL) and they came back with motionsickness. I still had testingcheats enabled so I got an error message when the little girl tried to vomit. Is it an error on the programming or am I having a conflict again? If it's a conflict, I don't give a damn - how many times will a sim vomit in my game? (pregnancy vomit still works fine)
So, here's the log file - it doesn't appear to be a normal hack/object-induced error. It says "Animation name is empty string."