@DH: discovered while tracking a minor bug today that the cause was some sea animals not using the animal AI (animals must do so currently or the AI gets very confused, so they need their defaultAI set that way). The game already corrects this on the fly when loading save games, but doesn't correct it at the point of first use, so it needs cleaning up in the assets at some point. It's not hugely urgent however, and I'm happy to do it if you don't mind me fiddling with your XML.
Whoever does it, it can wait until v20 is out - no major breakage caused - just niggling things. I'll also put an asset-load-time fix into the DLL to auto-correct with a (debug version) warning in case we wind up with it through a cut&paste again at some time in the future.