If FSHost or a utility could send a test packet to all players on the server that would report the same problem that causes FS to "Not connect to all players", it would immediatly tell us who is causing the problem.
There must be a reason why this can't be done or Russell would have done it long ago.
It would be nice if FS would report which player as it has that information.
Hmm, that brings up another question. Does FS find out who is online from the server?
If so maybe we could find out which one it chokes on

Qh well............
On another note, we sometimes have one or more "invisible" players. FSNav and FSHost track them and they are on the player list but when you fly near them, they cannot be seen?
Life is full of mysteries.