diff --git a/openslides/agenda/models.py b/openslides/agenda/models.py
index 9de46ee4d..b71817e22 100644
--- a/openslides/agenda/models.py
+++ b/openslides/agenda/models.py
@@ -77,7 +77,7 @@ class Item(MPTTModel, SlideMixin):
     """
     Type of the agenda item.
 
-    See Agenda.ITEM_TYPE for more informations.
+    See Item.ITEM_TYPE for more information.
     """
 
     duration = models.CharField(null=True, blank=True, max_length=5,
@@ -191,11 +191,11 @@ class Item(MPTTModel, SlideMixin):
         * normal slide of the item
 
         The method returns only one of them according to the config value
-        'presentation_argument' and the attribut 'related_sid'.
+        'presentation_argument' and the attribute 'related_sid'.
         """
         if config['presentation_argument'] == 'summary':
             data = {'title': self.get_title(),
-                    'items': self.get_children(),
+                    'items': self.get_children().filter(type__exact=Item.AGENDA_ITEM),
                     'template': 'projector/AgendaSummary.html'}
 
         elif config['presentation_argument'] == 'show_list_of_speakers':
diff --git a/openslides/agenda/signals.py b/openslides/agenda/signals.py
index e7f92afed..fec09339d 100644
--- a/openslides/agenda/signals.py
+++ b/openslides/agenda/signals.py
@@ -84,7 +84,10 @@ def agenda_list_of_speakers(sender, **kwargs):
         """
         slide = get_slide_from_sid(get_active_slide(only_sid=True), element=True)
         if not isinstance(slide, Item):
-            # Only show list of speakers on Agenda-Items
+            # Only show list of speakers overlay on agenda items
+            return None
+        if config['presentation_argument'] == 'show_list_of_speakers':
+            # Do not show list of speakers overlay on the list of speakers slide
             return None
         clear_projector_cache()
         list_of_speakers = slide.get_list_of_speakers(
diff --git a/openslides/agenda/templates/agenda/overlay_speaker_projector.html b/openslides/agenda/templates/agenda/overlay_speaker_projector.html
index 287536aa0..6c9b9ac3a 100644
--- a/openslides/agenda/templates/agenda/overlay_speaker_projector.html
+++ b/openslides/agenda/templates/agenda/overlay_speaker_projector.html
@@ -35,8 +35,8 @@
 </style>
 
 <div id="overlay_list_of_speaker_box">
+    <h3>{% trans 'List of speakers' %}:</h3>
     {% if list_of_speakers %}
-    <h3>{% trans "List of speakers" %}:</h3>
     <ul>
         {% for speaker_dict in list_of_speakers %}
         <li>
diff --git a/openslides/agenda/templates/agenda/view.html b/openslides/agenda/templates/agenda/view.html
index bad1cf15a..19c0debbb 100644
--- a/openslides/agenda/templates/agenda/view.html
+++ b/openslides/agenda/templates/agenda/view.html
@@ -135,7 +135,7 @@
     <p>
         {% if is_on_the_list_of_speakers %}
             <a href="{% url 'agenda_speaker_delete' object.id %}" class="btn">{% trans "Remove me from the list" %}</a>
-        {% elif not object.speaker_list_closed and perms.can_be_speaker %}
+        {% elif not object.speaker_list_closed and perms.agenda.can_be_speaker %}
             <a href="{% url 'agenda_speaker_append' object.id %}" class="btn">{% trans "Put me on the list" %}</a>
         {% endif %}
     </p>
diff --git a/openslides/agenda/views.py b/openslides/agenda/views.py
index 0f340bbed..b050aacb5 100644
--- a/openslides/agenda/views.py
+++ b/openslides/agenda/views.py
@@ -450,13 +450,14 @@ class CurrentListOfSpeakersView(RedirectView):
         """
         Returns the URL to the item_view if:
 
-        * the current slide is an item and
-        * the user has the permission to see the item
+        * the current slide is an item,
+        * the user has the permission to see the item and
+        * the list of speakers of the item is not closed,
 
         in other case, it returns the URL to the dashboard.
 
-        This method also add the request.user to the list of speakers, if he
-        has the right permissions.
+        This method also adds the request.user to the list of speakers, if he
+        has the right permissions and the list is not closed.
         """
         item = self.get_item()
         request = self.request
@@ -466,6 +467,10 @@ class CurrentListOfSpeakersView(RedirectView):
                 'Please choose the agenda item manually from the agenda.'))
             return reverse('dashboard')
 
+        if item.speaker_list_closed:
+            messages.error(request, _('The list of speakers is closed.'))
+            return reverse('dashboard')
+
         if self.request.user.has_perm('agenda.can_be_speaker'):
             try:
                 Speaker.objects.add(self.request.user, item)
diff --git a/openslides/core/templates/core/version.html b/openslides/core/templates/core/version.html
index ee118188c..b83508bcc 100644
--- a/openslides/core/templates/core/version.html
+++ b/openslides/core/templates/core/version.html
@@ -6,7 +6,9 @@
 
 {% block content %}
     <h1>{% trans 'Version' %}</h1>
+    <ul>
     {% for version in versions %}
-        <p>{{ version.0 }} {% trans "Version" %}: {{ version.1 }}</p>
+        <li>{{ version.0 }} – {% trans "Version" %} {{ version.1 }}</li>
     {% endfor %}
+    </ul>
 {% endblock %}
diff --git a/openslides/core/views.py b/openslides/core/views.py
index 8d0384deb..b33a91113 100644
--- a/openslides/core/views.py
+++ b/openslides/core/views.py
@@ -19,7 +19,7 @@ from openslides.utils.views import TemplateView
 
 class VersionView(TemplateView):
     """
-    Show version infos.
+    Shows version infos.
     """
     template_name = 'core/version.html'
 
@@ -32,20 +32,35 @@ class VersionView(TemplateView):
         # OpenSlides version. During development the git commit id is added.
         openslides_version_string = get_version()
         if not RELEASE:
-            openslides_version_string += ' Commit: %s' % get_git_commit_id()
+            openslides_version_string += ' – Commit %s' % get_git_commit_id()
         context['versions'] = [('OpenSlides', openslides_version_string)]
 
         # Versions of plugins.
         for plugin in settings.INSTALLED_PLUGINS:
+            # Get plugin
             try:
                 mod = import_module(plugin)
-                plugin_version = get_version(mod.VERSION)
-            except (ImportError, AttributeError, AssertionError):
+            except ImportError:
                 continue
+
+            # Get version.
             try:
-                plugin_name = mod.NAME
+                plugin_version = mod.get_version()
             except AttributeError:
-                plugin_name = mod.__name__.split('.')[0]
+                try:
+                    plugin_version = mod.VERSION
+                except AttributeError:
+                    continue
+
+            # Get name.
+            try:
+                plugin_name = mod.get_name()
+            except AttributeError:
+                try:
+                    plugin_name = mod.NAME
+                except AttributeError:
+                    plugin_name = mod.__name__.split('.')[0]
+
             context['versions'].append((plugin_name, plugin_version))
 
         return context
diff --git a/openslides/participant/api.py b/openslides/participant/api.py
index b4d127dc2..c1e865e65 100644
--- a/openslides/participant/api.py
+++ b/openslides/participant/api.py
@@ -102,9 +102,9 @@ def import_users(csv_file):
                     user.reset_password()
                     count_success += 1
     except csv.Error:
-        error_messages.appen(_('Import aborted because of severe errors in the input file.'))
+        error_messages.append(_('Import aborted because of severe errors in the input file.'))
     except UnicodeDecodeError:
-        error_messages.appen(_('Import file has wrong character encoding, only UTF-8 is supported!'))
+        error_messages.append(_('Import file has wrong character encoding, only UTF-8 is supported!'))
     return (count_success, error_messages)