Program: 69569
Project: 69569
Buggy source:
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  String currentGroup=null;
  User user=identityToModify.getUser();
  FormLayoutContainer groupContainer=null;
  for (  UserPropertyHandler userPropertyHandler : userPropertyHandlers) {
    if (userPropertyHandler == null) {
      continue;
    }
    String group=userPropertyHandler.getGroup();
    if (!group.equals(currentGroup)) {
      groupContainer=FormLayoutContainer.createDefaultFormLayout("String_Node_Str" + group,getTranslator());
      groupContainer.setFormTitle(translate("String_Node_Str" + group));
      formItems.put("String_Node_Str" + group,groupContainer);
      formLayout.add(groupContainer);
      if (currentGroup == null) {
        groupContainer.setFormContextHelp("String_Node_Str","String_Node_Str","String_Node_Str");
      }
      currentGroup=group;
    }
    FormItem formItem=userPropertyHandler.addFormItem(getLocale(),user,usageIdentifier,isAdministrativeUser,groupContainer);
    String propertyName=userPropertyHandler.getName();
    formItems.put(propertyName,formItem);
    if (formItem instanceof TextElement) {
      TextElement textElement=(TextElement)formItem;
      textElement.setValue(user.getProperty(propertyName,getLocale()));
    }
 else     if (formItem instanceof MultipleSelectionElement) {
      MultipleSelectionElement checkbox=(MultipleSelectionElement)formItem;
      String value=user.getProperty(propertyName,getLocale());
      if (value != null) {
        checkbox.select(propertyName,value.equals("String_Node_Str"));
      }
 else {
        checkbox.select(propertyName,false);
      }
    }
    if (userPropertyHandler.getName().equals("String_Node_Str")) {
      RegistrationManager rm=RegistrationManager.getInstance();
      String key=user.getProperty("String_Node_Str",null);
      TemporaryKeyImpl tempKey=rm.loadTemporaryKeyByRegistrationKey(key);
      if (tempKey != null) {
        XStream xml=XStreamHelper.createXStreamInstance();
        @SuppressWarnings("String_Node_Str") HashMap<String,String> mails=(HashMap<String,String>)xml.fromXML(tempKey.getEmailAddress());
        formItem.setExampleKey("String_Node_Str",new String[]{mails.get("String_Node_Str")});
      }
    }
  }
  groupContainer=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  groupContainer.setFormTitle(translate("String_Node_Str"));
  formLayout.add(groupContainer);
  HomePageConfig conf=hpcm.loadConfigFor(identityToModify.getName());
  textAboutMe=uifactory.addRichTextElementForStringData("String_Node_Str","String_Node_Str",conf.getTextAboutMe(),10,-1,false,null,null,groupContainer,ureq.getUserSession(),getWindowControl());
  textAboutMe.setMaxLength(10000);
  groupContainer=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  groupContainer.setFormTitle(translate("String_Node_Str"));
  groupContainer.setFormContextHelp("String_Node_Str","String_Node_Str","String_Node_Str");
  formLayout.add(groupContainer);
  deletePortrait=uifactory.addFormLink("String_Node_Str",groupContainer,Link.BUTTON);
  File portraitFile=dps.getBigPortrait(identityToModify.getName());
  Set<String> mimeTypes=new HashSet<String>();
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  portraitUpload=uifactory.addFileElement("String_Node_Str","String_Node_Str",groupContainer);
  portraitUpload.setMaxUploadSizeKB(10000,null,null);
  portraitUpload.setPreview(ureq.getUserSession(),true);
  portraitUpload.addActionListener(FormEvent.ONCHANGE);
  if (portraitFile != null) {
    portraitUpload.setInitialFile(portraitFile);
  }
  portraitUpload.limitToMimeType(mimeTypes,null,null);
  FormLayoutContainer buttonLayoutWrappper=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  formLayout.add(buttonLayoutWrappper);
  FormLayoutContainer buttonLayout=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonLayoutWrappper.add(buttonLayout);
  uifactory.addFormSubmitButton("String_Node_Str",buttonLayout);
  uifactory.addFormCancelButton("String_Node_Str",buttonLayout,ureq,getWindowControl());
}

Fixed version (ground truth):
@Override protected void initForm(FormItemContainer formLayout,Controller listener,UserRequest ureq){
  User user=identityToModify.getUser();
  boolean first=true;
  for (  UserPropertyHandler userPropertyHandler : userPropertyHandlers) {
    if (userPropertyHandler == null) {
      continue;
    }
    String group=userPropertyHandler.getGroup();
    String formId="String_Node_Str" + group;
    FormLayoutContainer groupContainer=(FormLayoutContainer)formLayout.getFormComponent(formId);
    if (groupContainer == null) {
      groupContainer=FormLayoutContainer.createDefaultFormLayout(formId,getTranslator());
      groupContainer.setFormTitle(translate("String_Node_Str" + group));
      if (first) {
        groupContainer.setFormContextHelp("String_Node_Str","String_Node_Str","String_Node_Str");
        first=false;
      }
      formItems.put(formId,groupContainer);
      formLayout.add(groupContainer);
    }
    FormItem formItem=userPropertyHandler.addFormItem(getLocale(),user,usageIdentifier,isAdministrativeUser,groupContainer);
    String propertyName=userPropertyHandler.getName();
    formItems.put(propertyName,formItem);
    if (formItem instanceof TextElement) {
      TextElement textElement=(TextElement)formItem;
      textElement.setValue(user.getProperty(propertyName,getLocale()));
    }
 else     if (formItem instanceof MultipleSelectionElement) {
      MultipleSelectionElement checkbox=(MultipleSelectionElement)formItem;
      String value=user.getProperty(propertyName,getLocale());
      if (value != null) {
        checkbox.select(propertyName,value.equals("String_Node_Str"));
      }
 else {
        checkbox.select(propertyName,false);
      }
    }
    if (userPropertyHandler.getName().equals("String_Node_Str")) {
      String key=user.getProperty("String_Node_Str",null);
      TemporaryKeyImpl tempKey=rm.loadTemporaryKeyByRegistrationKey(key);
      if (tempKey != null) {
        XStream xml=XStreamHelper.createXStreamInstance();
        @SuppressWarnings("String_Node_Str") HashMap<String,String> mails=(HashMap<String,String>)xml.fromXML(tempKey.getEmailAddress());
        formItem.setExampleKey("String_Node_Str",new String[]{mails.get("String_Node_Str")});
      }
    }
  }
  FormLayoutContainer groupContainer=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  groupContainer.setFormTitle(translate("String_Node_Str"));
  formLayout.add(groupContainer);
  HomePageConfig conf=hpcm.loadConfigFor(identityToModify.getName());
  textAboutMe=uifactory.addRichTextElementForStringData("String_Node_Str","String_Node_Str",conf.getTextAboutMe(),10,-1,false,null,null,groupContainer,ureq.getUserSession(),getWindowControl());
  textAboutMe.setMaxLength(10000);
  groupContainer=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  groupContainer.setFormTitle(translate("String_Node_Str"));
  groupContainer.setFormContextHelp("String_Node_Str","String_Node_Str","String_Node_Str");
  formLayout.add(groupContainer);
  deletePortrait=uifactory.addFormLink("String_Node_Str",groupContainer,Link.BUTTON);
  File portraitFile=dps.getBigPortrait(identityToModify.getName());
  Set<String> mimeTypes=new HashSet<String>();
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  mimeTypes.add("String_Node_Str");
  portraitUpload=uifactory.addFileElement("String_Node_Str","String_Node_Str",groupContainer);
  portraitUpload.setMaxUploadSizeKB(10000,null,null);
  portraitUpload.setPreview(ureq.getUserSession(),true);
  portraitUpload.addActionListener(FormEvent.ONCHANGE);
  if (portraitFile != null) {
    portraitUpload.setInitialFile(portraitFile);
  }
  portraitUpload.limitToMimeType(mimeTypes,null,null);
  FormLayoutContainer buttonLayoutWrappper=FormLayoutContainer.createDefaultFormLayout("String_Node_Str",getTranslator());
  formLayout.add(buttonLayoutWrappper);
  FormLayoutContainer buttonLayout=FormLayoutContainer.createButtonLayout("String_Node_Str",getTranslator());
  buttonLayoutWrappper.add(buttonLayout);
  uifactory.addFormSubmitButton("String_Node_Str",buttonLayout);
  uifactory.addFormCancelButton("String_Node_Str",buttonLayout,ureq,getWindowControl());
}