Seriously, there should be one, since there are only a handful of people in the community who use 1.23 for anything more than JCS and Online Play(And a few things that don't work in TSF, like Crazyanims).
I'll add the list here once someone posts it.

Originally Posted by Robo4900

(And a few things that don't work in TSF, like Crazyanims).

(Well, that oversimplifies the issue a a little. You can use animated tiles as animated tile frames in any version. It's flipped frames that's the issue. If the level with flipped frames is saved as 1.23-compatible, it'll crash TSF, but if it's not 1.23-compatible, then TSF will run it just fine.)