I have noticed that there are fleets which can no longer receive orders. I can't reliably cause a fleet to become a zombie. The version of the client i am using is 0.3.1.1. The server is running the minisec ruleset.
The game is still active on (04/06/2008) (demo1.thousandparsec.net) and the fleet id's 160, 207 both exhibit this behavior.
Traceback (most recent call last):
File "tp\client\threads.pyo", line 471, in OnCacheDirty
IOError: Unable to insert the order...
A full copy of the log has been attached.