This error arises when a firewall is somehow corrupting or truncating data being passed to Macaos Enterprise from the server.
We have confirmed that the NVIDIA ActiveArmor firewall supplied with NVIDIA nForce Network Controller causes this problem. We have reason to believe that other firewall versions from NVIDIA also cause problems. Turning off the firewall does not solve the problem. The firewall must be uninstalled.
Please let us know at support@macaos.com if you have this type of problem with other firewall or anti-virus products.