Version: 0.12.18
Date: 23. 11. 2015
Bugfixes:
— Fixed replay of a game created from another replay would crash the game. (https://www.factorioforums.com/forum/viewtopic.php?t=17703)
— Fixed that rotating an unpaired underground transport belt wouldn’t make its items go back (https://www.factorioforums.com/forum/viewtopic.php?t=17663).
— Fixed construction robots sometimes not picking up an underground transport belt whilst deconstructing it if it contains items
(https://www.factorioforums.com/forum/viewtopic.php?t=17663).
— Fixed all personal construction robots could get stuck waiting for trees to be gathered (https://www.factorioforums.com/forum/viewtopic.php?t=17755).
— Fixed crash caused by allowing mods to order units to attack a disconnected player’s character
(https://www.factorioforums.com/forum/viewtopic.php?t=17801).
— Fixed rare crash with construction robot. (https://www.factorioforums.com/forum/viewtopic.php?t=17851)
— Fixed the info about the energy consumption of personal roboport, to show the maximum consumption as other machines.
— Inventories with limit (chests) can get scroll bars when they are too big as well. (https://www.factorioforums.com/forum/viewtopic.php?t=17849)
— Fixed, that the train could get stuck when it has to accelerate to get to station that is very close.
(https://www.factorioforums.com/forum/viewtopic.php?t=17748)
— Fixed map exchange strings not being accepted when the quote sequence contains spaces (https://www.factorioforums.com/forum/viewtopic.php?t=17699)
— Fixed locomotive not centered on rails. (https://www.factorioforums.com/forum/viewtopic.php?t=16455)
— Fixed train lights were further away than they should be. (https://www.factorioforums.com/forum/viewtopic.php?t=16455)
— Fixed spitters freezing in some cases (https://www.factorioforums.com/forum/viewtopic.php?t=17830).
— Fixed crash when trying to load replay from save that doesn’t contain level-init.dat (https://www.factorioforums.com/forum/viewtopic.php?t=17884).
— Fixed incorrect default request amounts for shield and battery euquipment due to typo (https://www.factorioforums.com/forum/viewtopic.php?t=17879).
— Fixed save with modded roboport could become unloadable without the mod (https://www.factorioforums.com/forum/viewtopic.php?t=17882).
— Fixed beam animations for modded weapons (https://www.factorioforums.com/forum/viewtopic.php?t=17781).
— Fixed that reconnecting train in special case lead to corruption of the rail state. (https://www.factorioforums.com/forum/viewtopic.php?t=17627)
Changes:
— Improved formating of map exchange string.
Scripting:
— Reading or writing LuaPlayer::character will now fail if the LuaPlayer isn’t connected (see LuaPlayer::connected).
— Lua API documentation is included in release packages (directory doc-html)

Version: 0.12.19
Date: 24. 11. 2015
Bugfixes:
— Fixed Optics technology icon was corrupted sometimes on OSX. (https://www.factorioforums.com/forum/viewtopic.php?t=17776)
— Fixed crash in GroupBehavior (https://www.factorioforums.com/forum/viewtopic.php?t=17971).
— Ingame changelog only shows changes since the last stable release.
— Fixed beam weapon and turret issues (https://www.factorioforums.com/forum/viewtopic.php?t=17781).
— Fixed rocket silo inserters sometimes getting stuck (https://www.factorioforums.com/forum/viewtopic.php?t=17956).
— Fixed ghost trains appearing on minimap.
— Fixed manual crafting bug that could be exploited to get resources (https://www.factorioforums.com/forum/viewtopic.php?t=17947).