0.12.15
Bugfixes:
— Fixed that it wasn’t possible to execute ui actions while the game was stopped (research, tips and trikcs etc.)
— Fix of fix of loading of game containing lua objects.

0.12.14
Graphics:
— Added new smoke graphics
Bugfixes:
— Fixed loading of game containing duplicate lua tables. (https://www.factorioforums.com/forum/viewtopic.php?t=17275)
— Fixed flickering light intensity at the edge of the screen when moving.
— Fixed crash when pasting from empty clipboard into console on OS X.
— Fixed crash when reviving train stop that was connected to rail while destroyed while the rail no longer exists.
— Some ui actions made while the game was being saved were actually not executed altough it looked like it.
(https://www.factorioforums.com/forum/viewtopic.php?t=16866)

0.12.13
Bugfixes:
— Fixed that blueprint gates were colliding with ghost gates with same type and direction. (https://www.factorioforums.com/forum/viewtopic.php?t=17151)
— Fixed that LuaEntity::clear_request_slot and set_request_slot wouldn’t update the logistics GUI if it happened to be opened at the same time. This time it’s fixed for logistic chests as well. (https://www.factorioforums.com/forum/viewtopic.php?t=17196)
— Fixed crash when trying to open car GUIs in the map editor. (https://www.factorioforums.com/forum/viewtopic.php?t=17148)
— Fixed the desync issues related to converting floating point numbers to string in lua. (https://www.factorioforums.com/forum/viewtopic.php?t=16638)
Note: until 0.13 other special values like nan, inf etc. are not solved properly, so they shouldn’t be used.
— Fixed crash when loading a savegame with self recursive table elements. (https://www.factorioforums.com/forum/viewtopic.php?t=17204)
— Fixed that furnaces deactivated improperly when switching products. (https://www.factorioforums.com/forum/viewtopic.php?t=17146)
— Fixed crashes on linux (when download failed, after Lua error, …)