Here is a log sample from TightVNC for Windows (Server version 1.2.9)
vncServer.cpp : trying port number 5900
Sun Nov 19 07:11:42 2006
vncSockConnect.cpp : started socket connection thread
Sun Nov 19 12:03:45 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file / requested
vncHTTPConnect.cpp : sending main page
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
Sun Nov 19 12:03:52 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /favicon.ico requested
Sun Nov 19 12:03:53 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
Sun Nov 19 12:03:55 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
Sun Nov 19 12:04:05 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
vncClient.cpp : authentication failed
Sun Nov 19 12:04:08 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
Sun Nov 19 12:04:10 2006
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncMenu.cpp : KillActiveDesktop
Sun Nov 19 12:04:25 2006
vncDesktop.cpp : display resolution or desktop changed.
Sun Nov 19 12:15:41 2006
vncClient.cpp : client disconnected : 127.0.0.1 (id 1)
vncServer.cpp : deleting desktop server
Sun Nov 19 12:15:44 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file / requested
vncHTTPConnect.cpp : sending main page
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
Sun Nov 19 12:15:52 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
vncMenu.cpp : KillActiveDesktop
Sun Nov 19 12:30:45 2006
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncClient.cpp : client disconnected : 127.0.0.1 (id 1)
vncServer.cpp : deleting desktop server
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
Sun Nov 19 20:15:35 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file / requested
vncHTTPConnect.cpp : sending main page
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
Sun Nov 19 20:15:43 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /favicon.ico requested
Sun Nov 19 20:15:44 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
Sun Nov 19 20:15:45 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file /VncViewer.jar requested
Sun Nov 19 20:15:51 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncMenu.cpp : KillActiveDesktop
Sun Nov 19 20:15:55 2006
vncDesktop.cpp : display resolution or desktop changed.
Sun Nov 19 20:57:29 2006
vncDesktop.cpp : display resolution or desktop changed.
Sun Nov 19 21:00:59 2006
vncDesktop.cpp : display resolution or desktop changed.
Sun Nov 19 21:01:29 2006
vncClient.cpp : client disconnected : 127.0.0.1 (id 1)
vncServer.cpp : deleting desktop server
Sun Nov 19 22:55:50 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
Sun Nov 19 22:56:31 2006
vncHTTPConnect.cpp : HTTP client connected
Mon Nov 20 00:25:31 2006
vncHTTPConnect.cpp : HTTP client connected
Mon Nov 20 00:25:41 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
Mon Nov 20 00:48:57 2006
vncHTTPConnect.cpp : HTTP client connected
vncHTTPConnect.cpp : file / requested
vncHTTPConnect.cpp : sending main page
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
Mon Nov 20 00:49:04 2006
vncSockConnect.cpp : accepted connection from 127.0.0.1
vncClient.cpp : client connected : 127.0.0.1 (id 1)
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncService.cpp : SelectHDESK failed to close old desktop 28, error=170
vncMenu.cpp : KillActiveDesktop
Mon Nov 20 00:49:08 2006
vncDesktop.cpp : display resolution or desktop changed.
Mon Nov 20 00:55:34 2006
vncClient.cpp : client disconnected : 127.0.0.1 (id 1)
vncServer.cpp : deleting desktop server