Version 0.1.2 is a hotfix for a game-breaking bug with planters.
It is now not possible for colonists to plant cacta in hydroponics planters, or hydrea in stone planters - this is the intended behaviour.
Any save games broken by this bug will now be automatically be fixed on load.
Thanks for @diegokilla for finding this bug and providing me with the information I needed to diagnose the problem.