YAML file:

----- %< -----
generator:
  class: sfDoctrineGenerator
  param:
    model_class:           JobeetJob
    theme:                 admin
    non_verbose_templates: true
    with_show:             false
    singular:              ~
    plural:                ~
    route_prefix:          jobeet_job_job
    with_doctrine_route:     1

    config:
      actions: ~
      fields:
        is_activated: { label: Activated?, help: Whether the user has activated the job, or not }                              // <-- here is the error, to avoid remove "?"
        is_public:    { label: Public?, help: Whether the job can also be published on affiliate websites, or not }       // the same applies here
      list:
        title: Job Management
      filter:  ~
      form:    ~
      edit:
        title: Editing Job "%%company%% is looking for a %%position%%"
      new:
        title: Job Creation
----- %< -----

Product Version: NetBeans IDE 6.7 RC2 (Build 200906030001)
Java: 1.6.0_13; Java HotSpot(TM) 64-Bit Server VM 11.3-b02
System: Linux version 2.6.30-020630rc8-generic running on amd64; UTF-8; cs_CZ (nb)