The full release notes for this release can be seen here:
http://arcengames.com/mediawiki/index.php?title=Tidalis_-_0.410_Beta_ReleaseSo, much shorter turnaround on this one than 0.409, to say the least.
Two releases in one day! First time that's happened for Tidalis, though it's happened many times with AI War in the past. Mainly because AI War was at a more mature state when that was happening, and Tidalis is now getting into that sort of area.
As noted in the 0.409 thread, there was an issue with a lot of the content being in the wrong folder there initially, but 0.410 fixes those problems without your needing to do anything -- still getting used to the new Tidalis update process, apologies.
Anyway, even if there hadn't been the issue with the 0.409 install, I was planning on doing this new beta release anyway -- it's absolutely chock full of new stuff: 3 new special blocks, and 2 new game modes, and they are all really notably cool. Enjoy!