Sol 0 version 0.52 has been released! Visit the download page to pick up the new version. As of this update, Sol 0 is now using the professional version of the Unity engine. Already this change has been well worth the cost of the license. Unity's profiler identified a few spots in the code that let me get a big performance increase. Thanks to everyone who has bought into the beta, allowing me to afford the license cost. At this point, all the money I make from Sol 0 has gone into software, hardware, and business costs in preparation for a Steam release.
Here's a list of changes:
The building placement errors that were introduced in the last update have been fixed, as have the orientation problems when two astronauts try to build something at the same time.
Fraps may be used to record gameplay without crashing the game (at least on my machine).
Various optimizations, especially with colonists, result in a much smoother game. Shadows are still a big problem, luckily I know how to make them much better! For now, I would suggest turning shadows off to get a 50% performance increase.
Bulldozers have slightly better performance.
Drag to select has been improved.
Replaced the two custom levels bundled with the game with a Europa level, which fits the style of the game a bit better.