The latest update included misc. balancing and fix for late game Hovertank bug - you were able to hammer it down with knock back enhancements and big damage. Shouldn't be possible any more.
The Linux version had some library issues with libpng so you need to use the beta-branch to access the latest update for now. We'll fix it when we have time.
Also check out http://teslavslovecraft.com for our upcoming game!
In any case: Happy holidays to everyone!