Program: 25122
Project: 25122
Buggy source:
public boolean onChat(Player player,String message){
  String temp2="String_Node_Str" + player.getColor() + player.getName()+ Colors.White+ "String_Node_Str";
  String adminchat=Colors.DarkPurple + "String_Node_Str" + player.getColor()+ player.getName()+ Colors.DarkPurple+ "String_Node_Str"+ Colors.White+ "String_Node_Str";
  String message2="String_Node_Str";
  String check=temp2 + message;
  if (settings.getInstance().adminchat() && message.startsWith("String_Node_Str") && (player.isAdmin() || player.canUseCommand("String_Node_Str"))) {
    for (    Player p : etc.getServer().getPlayerList()) {
      String blaa="String_Node_Str";
      if (p != null) {
        if (p.isAdmin() || (p.canUseCommand("String_Node_Str"))) {
          for (int x=1; x < message.length(); x++) {
            blaa+=message.charAt(x);
          }
          if (p.isAdmin() || (p.canUseCommand("String_Node_Str"))) {
            if (p != null) {
              p.sendMessage(adminchat + blaa);
            }
          }
        }
      }
    }
    id.a.log(Level.INFO,"String_Node_Str" + temp2 + message);
    return true;
  }
  if (settings.getInstance().greentext() && message.startsWith("String_Node_Str")) {
    id.a.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=Colors.LightGreen + message;
    message2=temp2 + message;
    other.gmsg(message2);
    return true;
  }
  if (settings.getInstance().FFF() && message.startsWith("String_Node_Str")) {
    id.a.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=Colors.Red + message;
    message2=temp2 + message;
    other.gmsg(message2);
    return true;
  }
  if (settings.getInstance().quakeColors() && message.length() > 2 && other.lengthCheck(check)) {
    String temp="String_Node_Str";
    for (int x=0; x < message.length(); x++) {
      if (message.charAt(x) == '^' && x != message.length() - 1) {
        temp+=other.colorChange(message.charAt(x + 1));
        x+=1;
      }
 else {
        temp+=message.charAt(x);
      }
    }
    id.a.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=temp2 + temp + "String_Node_Str";
    for (    Player p : etc.getServer().getPlayerList()) {
      if (p != null) {
        other.gmsg(message);
        return true;
      }
    }
  }
  return false;
}

Fixed version (ground truth):
public boolean onChat(Player player,String message){
  String temp2="String_Node_Str" + player.getColor() + player.getName()+ Colors.White+ "String_Node_Str";
  String adminchat=Colors.DarkPurple + "String_Node_Str" + player.getColor()+ player.getName()+ Colors.DarkPurple+ "String_Node_Str"+ Colors.White+ "String_Node_Str";
  String message2="String_Node_Str";
  String check=temp2 + message;
  if (settings.getInstance().adminchat() && message.startsWith("String_Node_Str") && (player.isAdmin() || player.canUseCommand("String_Node_Str"))) {
    for (    Player p : etc.getServer().getPlayerList()) {
      String blaa="String_Node_Str";
      if (p != null) {
        if (p.isAdmin() || (p.canUseCommand("String_Node_Str"))) {
          for (int x=1; x < message.length(); x++) {
            blaa+=message.charAt(x);
          }
          if (p.isAdmin() || (p.canUseCommand("String_Node_Str"))) {
            if (p != null) {
              p.sendMessage(adminchat + blaa);
            }
          }
        }
      }
    }
    log.log(Level.INFO,"String_Node_Str" + temp2 + message);
    return true;
  }
  if (settings.getInstance().greentext() && message.startsWith("String_Node_Str")) {
    log.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=Colors.LightGreen + message;
    message2=temp2 + message;
    other.gmsg(message2);
    return true;
  }
  if (settings.getInstance().FFF() && message.startsWith("String_Node_Str")) {
    log.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=Colors.Red + message;
    message2=temp2 + message;
    other.gmsg(message2);
    return true;
  }
  if (settings.getInstance().quakeColors() && message.length() > 2 && other.lengthCheck(check)) {
    String temp="String_Node_Str";
    for (int x=0; x < message.length(); x++) {
      if (message.charAt(x) == '^' && x != message.length() - 1) {
        temp+=other.colorChange(message.charAt(x + 1));
        x+=1;
      }
 else {
        temp+=message.charAt(x);
      }
    }
    log.log(Level.INFO,"String_Node_Str" + player.getName() + "String_Node_Str"+ message);
    message=temp2 + temp + "String_Node_Str";
    for (    Player p : etc.getServer().getPlayerList()) {
      if (p != null) {
        other.gmsg(message);
        return true;
      }
    }
  }
  return false;
}