Changes

Inserters are slightly faster when picking up from belts as they can now select an item and pick it up in the same tick.

Bugfixes

Fixed a special case of assembler pipe connection bug. more
Fixed a crash when trying to check for mod updates with mods that have dependencies not on the mod portal.
Fixed that multiple modded inserters aiming for the same belt would compete for the same item. more
Fixed that opening signal by circuit network could let train to go to a reserved/occupied block. more
Fixed that it was possible to build a special rail crossing that didn't merge the blocks and allowed trains to cross without collisions. more
Fixed a crash related to pathfinding toward a moving target, such as when the player was fighting biters. (https://forums.factorio.com/71989 https://forums.factorio.com/72011)
Fixed turret ranges would not render properly on some models of Apple computers with Intel integrated GPU. more
Fixed most of the Map Editor GUI would still work when doing replays. more
Fixed that "the hand" didn't work correctly in the Map Editor when the inventory was full. more
Fixed that cut ignored the not-minable and not-deconstructable flags in some cases. more
Fixed rail signal to block binding that occurred in special cases. more
Fixed shooting would refresh only the first beam if multiple beams were active. more
Fixed that cloning rails with locomotive on top in the map editor made the copied rails not minable even when the locomotive was removed. more
Fixed another train pathfinding issue related to re-pathing while in chain signal sequence. more

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