Perfect timing - I just had this problem on our server last night.
However, I'm getting the following errors in the console . . .
L 09/11/2009 - 04:29:22: [SM] Native "KillTimer" reported: Invalid timer handle b3b100f7 (error 1)
L 09/11/2009 - 04:29:22: [SM] Displaying call stack trace for plugin "custom/l4d_kickloadstuckers.smx":
L 09/11/2009 - 04
0:14: [SM] Native "KillTimer" reported: Invalid data handle c39100f8 (error 1) on timer kill with TIMER_DATA_HNDL_CLOSE
L 09/11/2009 - 04
0:14: [SM] Displaying call stack trace for plugin "custom/l4d_kickloadstuckers.smx":
L 09/11/2009 - 04
0:14: [SM] [0] Line 51, /home/groups/alliedmodders/forums/files/5/2/2/3/3/49427.attach::OnClientDisconnect()
L 09/11/2009 - 04
0:14: [SM] Native "KillTimer" reported: Invalid timer handle b3ad00fd (error 3)
L 09/11/2009 - 04
0:14: [SM] Displaying call stack trace for plugin "custom/l4d_kickloadstuckers.smx":
L 09/11/2009 - 04
0:14: [SM] [0] Line 51, /home/groups/alliedmodders/forums/files/5/2/2/3/3/49427.attach::OnClientDisconnect()