Optimizations

• Improved save-game speed by up to 2x depending on the save file size.

Bugfixes

• Fixed that ghost reversion orders prevented manual reversion. more
• Fixed application of the forced ghost mode that removes trees/rocks/cliffs in the way when ghost building. more
• Fixed that undo didn't work for upgrade order created by ghost overbuilding.
• Fixed extra collision message for ghost drag-building belts. more
• Fixed crash related to rolling stock drag building. more
• Fixed not loadable saves related to invalid blueprint settings when entities are migrated in a certain way. more
• Added missing tips and trick entries related to fast belt bending and belt traversing.
• Fixed a crash related to building rail in a specific situation. more
• Fixed underground belt collision check with underground belt ghost. 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.