had to split the postings cuz of maximum characters

My friends log (SERVER):

883194.978465 Info MultiplayerManager.cpp:774: networkTick(0) mapTick(-1) changing state from(Disconnected) to(PreparedToHostGame)
883194.978490 Info MultiplayerManager.cpp:774: networkTick(0) mapTick(-1) changing state ...

Hi guys,

just bought the game few days ago. Really sick for being alpha, fkking love it so far!
Im playing with a mate online, if someone tries to repair anything factorio crashes.

http://i.imgur.com/5xanrJl.png

Both of us have no mods installed. Further there is no difference depending on who ...