Program: 21301
Project: 21301
Buggy source:
@Override public void handlePremium(DownloadLink downloadLink,Account account) throws Exception {
  if (downloadLink.getDownloadURL().matches("String_Node_Str")) {
    new Serienjunkies().handleFree(downloadLink);
    return;
  }
  String user=account.getUser();
  String pass=account.getPass();
  LinkStatus linkStatus=downloadLink.getLinkStatus();
  downloadLink.setUrlDownload("String_Node_Str" + Netloadin.getID(downloadLink.getDownloadURL()) + "String_Node_Str");
  br.setFollowRedirects(false);
  br.getPage("String_Node_Str" + HOST);
  br.postPage("String_Node_Str" + HOST + "String_Node_Str","String_Node_Str" + user + "String_Node_Str"+ pass+ "String_Node_Str");
  if (br.getRedirectLocation() == null) {
    linkStatus.addStatus(LinkStatus.ERROR_PREMIUM);
    return;
  }
  br.getPage(downloadLink.getDownloadURL());
  HTTPConnection con;
  if (br.getRedirectLocation() == null) {
    checkPassword(downloadLink,linkStatus);
    if (linkStatus.isFailed())     return;
    if (br.containsHTML(FILE_NOT_FOUND)) {
      linkStatus.addStatus(LinkStatus.ERROR_FILE_NOT_FOUND);
      return;
    }
    if (br.containsHTML(FILE_DAMAGED)) {
      linkStatus.setErrorMessage("String_Node_Str");
      linkStatus.addStatus(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE);
      linkStatus.setValue(20 * 60 * 1000l);
      return;
    }
    String url=br.getRedirectLocation();
    if (url == null)     url=br.getRegex("String_Node_Str").getMatch(0);
    if (url == null) {
      logger.severe("String_Node_Str");
      linkStatus.addStatus(LinkStatus.ERROR_PLUGIN_DEFEKT);
      return;
    }
    con=br.openGetConnection(url);
    for (int i=0; i < 10 && (!con.isOK()); i++) {
      try {
        con=br.openGetConnection(url);
      }
 catch (      Exception e) {
        try {
          Thread.sleep(150);
        }
 catch (        InterruptedException e2) {
          e2.printStackTrace();
        }
      }
    }
  }
 else {
    con=br.openGetConnection(null);
  }
  sleep(100,downloadLink);
  dl=new RAFDownload(this,downloadLink,con);
  dl.setResume(true);
  dl.setChunkNum(JDUtilities.getSubConfig("String_Node_Str").getIntegerProperty(Configuration.PARAM_DOWNLOAD_MAX_CHUNKS,2));
  dl.setLoadPreBytes(1);
  dl.startDownload();
}

Fixed version (ground truth):
@Override public void handlePremium(DownloadLink downloadLink,Account account) throws Exception {
  if (downloadLink.getDownloadURL().matches("String_Node_Str")) {
    new Serienjunkies().handleFree(downloadLink);
    return;
  }
  String user=account.getUser();
  String pass=account.getPass();
  LinkStatus linkStatus=downloadLink.getLinkStatus();
  downloadLink.setUrlDownload("String_Node_Str" + Netloadin.getID(downloadLink.getDownloadURL()) + "String_Node_Str");
  br.setDebug(true);
  br.setFollowRedirects(false);
  br.postPage("String_Node_Str" + HOST + "String_Node_Str","String_Node_Str" + user + "String_Node_Str"+ pass+ "String_Node_Str");
  if (br.getRedirectLocation() == null) {
    linkStatus.addStatus(LinkStatus.ERROR_PREMIUM);
    return;
  }
  br.getPage(downloadLink.getDownloadURL());
  HTTPConnection con;
  if (br.getRedirectLocation() == null) {
    checkPassword(downloadLink,linkStatus);
    if (linkStatus.isFailed())     return;
    if (br.containsHTML(FILE_NOT_FOUND)) {
      linkStatus.addStatus(LinkStatus.ERROR_FILE_NOT_FOUND);
      return;
    }
    if (br.containsHTML(FILE_DAMAGED)) {
      linkStatus.setErrorMessage("String_Node_Str");
      linkStatus.addStatus(LinkStatus.ERROR_TEMPORARILY_UNAVAILABLE);
      linkStatus.setValue(20 * 60 * 1000l);
      return;
    }
    String url=br.getRedirectLocation();
    if (url == null)     url=br.getRegex("String_Node_Str").getMatch(0);
    if (url == null) {
      logger.severe("String_Node_Str");
      linkStatus.addStatus(LinkStatus.ERROR_PLUGIN_DEFEKT);
      return;
    }
    con=br.openGetConnection(url);
    for (int i=0; i < 10 && (!con.isOK()); i++) {
      try {
        con=br.openGetConnection(url);
      }
 catch (      Exception e) {
        try {
          Thread.sleep(150);
        }
 catch (        InterruptedException e2) {
          e2.printStackTrace();
        }
      }
    }
  }
 else {
    con=br.openGetConnection(null);
  }
  sleep(100,downloadLink);
  dl=new RAFDownload(this,downloadLink,con);
  dl.setResume(true);
  dl.setChunkNum(JDUtilities.getSubConfig("String_Node_Str").getIntegerProperty(Configuration.PARAM_DOWNLOAD_MAX_CHUNKS,2));
  dl.setLoadPreBytes(1);
  dl.startDownload();
}