Changes

Fast replacing power poles will keep existing connections but also try to connect to further away power poles if possible. more
0-255 numbers are now allowed in [color] tags. The game will detect if you want to use floats or 0-255, just like the /color command. more

Bugfixes

Solved transport line compression related to splitters for various corner cases. more
Fixed texture-compression config values that were valid in 0.17.15 but are not valid since 0.17.16 would cause error on startup. more
Fixed that reverse/forward speed limits of the train movements were mixed up. more
Fixed that reverse locomotive power was the same as forward.
Fixed item transfers tutorial giving combinators instead of wood. more
Fixed tutorials showing migrations dialog.
Fixed slow inserters on transport belt madness level 3. more
Fixed massive biter clumps in Wave defense. more
Fixed a crash when importing save files into saves with different technology levels researched.
Fixed that swapping Command and Option keys on macOS caused neither one to work in Factorio. more
Fixed that the technology GUI would list all technology levels if the technology was fully researched. more
Fixed a crash when using /swap-players. more
Fixed a crash when rotating some modded underground pipes. more
Fixed poor performance when large chat messages are rendered. more
Fixed a crash when a train traveling to a temporary stop has its schedule copy-pasted. more
Fixed a crash when using "Join server after sync" for server hosted over Steam Networking. more
Fixed hand missing from quickbar when selecting shortcuts to the blueprint library. more

Added LuaControl::open_technology_gui(technology) which will open the technology GUI and select the given technology.

Use the automatic updater if you can (check experimental updates in other settings) or download full installation at http://www.factorio.com/download/experimental.