I know that OP wont put an eye on it very soon - but it hought to post it anyway.
I somewhere have found that those constant crashes are not server related but there must be a reason that all clients seems to loose the connection concurrently. Thats when players are kicked because NPCs seems to appear or shot each other... dunno exactly what.
I found a thread on TSP with a few crash offsets - that could help to limit the expectations for possible crashes. Requirement would be that the server crashes.
Here the link to TSP with some offsets: http://the-starport.net/freela…t_id=28686#forumpost28686
Is there already known what causes this behaviour or are these all assumptions and we are still stepping in the dark?