Beginning three days ago (with no changes to the server) a single user on our network has been greeted each morning with a dialog reporting that the main shared volume on our 10.5.8 server has been disconnected. "Server connections interrupted. Ignore. Disconnect All." Choosing any option results in the server volume staying mounted but the files are unavailable (spinning gear forever when browsing the mounted volume). Only restarting the client and remounting the shared volume fixes the problem. The other user on our network sees no such message, though this Mac is set to go to sleep during the night whereas the one receiving the message does not sleep. Both clients are running the latest version of Lion. I'm not sure where to begin diagnosing this. Is it likely a server issue or a client issue? The behavior points to a client problem. What logs should I examine to get a clue? I appreciate any suggestions. Thanks!