3	The Parallel Toy (up to date with and slightly more recent than The Powder Toy 99.3)
3	Build 3
3		Initial release as a mod
3		Subframe is broken; this is by design and will not be fixed
3		Powder and liquid movement is sometimes funny
3		Water equalization hinders multithreading
3		Partial frame steps hinder multithreading and are no longer a useful debug tool
3		Lua scripts are expected to crash the game, please don not report such issues.
4	The Parallel Toy (up to date with and slightly more recent than The Powder Toy 99.3)
4	Build 4
4		Some performance improvements; sim.threads(1) should now be as fast as single-threaded TPT
4		Subframe is broken; this is by design and will not be fixed
4		Water equalization hinders multithreading
4		Partial frame steps hinder multithreading and are no longer a useful debug tool
4		Lua scripts are expected to crash the game, please do not report such issues