Bugfixes

• Fixed possible crashes when building train wagons near train wagon ghosts that are not on rails.
• Fixed that the search didn't work correctly in the prototypes GUI in some cases. more
• Fixed that extra warning sound was played when upgrading underground from the exit side. 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.