> I'm trying to keyframe text with tracking (and not even a very extreme
> spread), to emulate the text puling apart and no matter what I do, when I
> render it, it comes out jaggedy.
Not being a big Motion or LiveType fan myself, I've used this technique on my FCP-generated titles lots of times and never had this issue. Chances are you're watching your results on the Canvas window, which always shows effects in the timeline as being crappy, even when rendered. Use an external monitor to watch your timeline, always, if you want to see what it'll really look like on a movie file or on tape.