So I've tried to fix http://bugs.openclonk.org/view.php?id=737 and the reason was a missing effect, just as I suspected. However as I was looking for the right place to fix it, I was wonderding WHY the effect was missing, and why it doesn't get re-added.

I've tried to re-add them in UpdateTransferZone for testing purpose. However the player doesn't have any crew selected there, so I don't know the clonk to add it to. Furthermore CrewSelection or any similar callback doesn't seem to be called.

There is no documentation on Savegame-handling and it seems that some effects survive Savegames and others don't. Can I have some clear input on WHAT exactly happens with savegames?