Full release notes:
http://arcengames.com/mediawiki/index.php?title=Tidalis_-_0.415_Beta_ReleaseNothing singularly noteworthy in this one, but there are a ton of refinements to the physics and other various aspects of the game. The water mode really did a number on a lot of the calculations, as I mentioned in the last release notes as well, and this release is mainly geared at cleaning that up even further, and providing some other internal optimizations. In the process we've also fixed some longstanding small gripes with hit detection and such, so all in all this has been a really positive few days for the game even outside of water mode, as the physics are really getting locked down to the point of being really airtight.