Okay! Enough screwing around. For a year and a half now I've been letting myself get distracted by all sorts of other projects, and between that and my unconscionable version control practices I haven't gotten a damn thing done with this plugin.
Armed with what Git I learned working on an unrelated project, I've abandoned the sloppy repo I had going for the next major TurnsTile release. I've started from scratch, adding in the first five releases as they were but then proceeding to commit in something like a responsible manner. The code for Avxsynth and Vapoursynth support is largely ready to go, but before going back and cleanly applying those changes to the new repository I've decided to assemble a quick fix for a bug I can't believe I never noticed.
TurnsTile 0.3.2 allows you to use the interlaced parameter along with a tilesheet, something that's apparently been broken since September of 2011. I was almost convinced I was doing this right.
I've also set myself up on GitHub, so if you want to follow along as I inch my way toward 0.4.0 (or 1.0.0, or whatever I end up calling it) feel free:
https://github.com/ItEndsWithTens/TurnsTile