well now thatd be quite a fluke... it really disconnected me and the others exactly after i typed the who command.. what time did you do the restart?
oh and why btw, normally you shouldnt need to restart it except if you recompiled it?
anyway, maybe it was the restart, cause afaik it was up again instantly after we were disconnected, except if you have someting running that checks if the server is running and auto restarts it after a crash..