Bugfixes

Fixed trees and stones would block placement of wall ghosts. more
Fixed interaction with entities from zoomed-to-world view in editor. more
Fixed spidertrons with burner energy sources didn't interact with auto-trash correctly. more
Fixed a crash when viewing styles in the prototype explorer GUI. more
Fixed a crash when fast-replacing electric pole ghosts with non-electric-poles. more
Fixed that robots building trains with equipment grids didn't work correctly. more
Fixed that changes in mod settings textboxes weren't highlighted when hovering reset/back button. more
Fixed that pressing Escape in mod settings with unconfirmed changes didn't open the confirmation dialog as in other settings.
Fixed crash when mod destroys currently opened locomotive and creates and opens new one right away. more
Fixed mods gui for case when the mod title can't fit the space. more
Fixed unloadable save related to underground belts in a weird state. more
Fixed corner case of drawing wires between ghosts and non-ghost entities. more
Fixed a crash when using upgrade planners through the Lua API. more
Fixed wrong entity selection in multiplayer when using ghost cursor with rail. more
Fixed accumulator charged status for some extreme cases. more

Modding

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