Opened my errors log today, this was being spammed all over it.
PHP Code:
L 08/27/2013 - 15:16:02: [SM] Native "IsPlayerAlive" reported: Invalid client index 23
L 08/27/2013 - 15:16:02: [SM] Displaying call stack trace for plugin "smac_speedhack.smx":
L 08/27/2013 - 15:16:02: [SM] [0] Line 123, smac_speedhack.sp::OnPlayerRunCmd()