Lets see if you have a network/connectivity issue.
Start an all day ping from 2 macs hitting the LAN address of your router
And run a constant ping from 2 macs to your server.
You might find that you have a LAN or Wifi issue.
A brief drop could cause you to lose a server connection.
Maybe nothing to do with the server.
If you find that the machines pinging the router have 0% packet loss and the machines pinging the server have 10% packet loss, then you could have a server issue or a problem on its lan segment/wiring.
You think apple would of disigned the clents to have some buffer preventing the machines from dropping off the server... or a auto reconect option...seems a bit dependant on a perfect conection...
Ill try the Ping test, but i think the problem is in the clients Sleep funtion...My staff has experianced 90% less network dropings since i made the clients never go to sleep...
What does that sound like?
Thanks your your input....