received message with invalid client_id

I am running a Mac Mini Server with Mac OSX 10.7.3 Server and when I log in with a client (also a Mac Mini running Lion OSX 10.7.3) I see this in the system log. Everything is working fine but I don't understand why I recieve these messages.

Feb 23 12:28:15 server AppleFileServer[558]: received message with invalid client_id 462

Feb 23 12:28:15 server AppleFileServer[558]: received message with invalid client_id 463

Feb 23 12:28:17 server AppleFileServer[558]: received message with invalid client_id 470

Feb 23 12:28:17 server AppleFileServer[558]: received message with invalid client_id 471

If I log in with an older Mac Mini running Snow Leopard I don't see these messages. I tried this with another Mac Mini running the same Lion 10.7.3 and I see the same messages (different id numbers).

Anybody have an idea why this is happening?

Thanks,

Tony