The other improvement today was in the MF2 parser. It's still not 100% compatible (or 80%), but I parses more things than it did yesterday.
I'm researching how to handle the listen-of property, so I can respond to Chris and David. Especially since they mentioned my Android app and both mentioned they used it.
Mystery solved: the reason not all posts were indexed after being posted was because of an extra job worker running a previous version of the code. Quite a few times it was quicker than the real workers and it seemed it didn't work.
I should add a <pre> tag to the code snippets.