Please describe the problem:
In a application of mine I've used Glade to generate the GUI. Now with GTK 2.12, I've decided to switch to GtkBuilder. First of all, I've run the 'gtk-builder-convert' script which is bundled with GTK to transform the Glade file to a GtkBuilder file.

In the original glade file there is a GtkMenuBar containing some GtkMenuItem's. All the labels of the GtkMenuItem's are marked with the 'translatable="yes"' property.

Now with GtkBuilder, the GtkMenuBar and the GtkMenuItem's are transformed into a GtkUIManager containing GtkAction's. However, when I start my program using the GtkBuilder, the menu items don't get translated, while they were translated just fine when using Glade.

Here is a snippet from my Glade file:

          <widget class="GtkMenuBar" id="menubar1">
            <property name="visible">True</property>
            <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
            <child>
              <widget class="GtkMenuItem" id="menuitem1">
                <property name="visible">True</property>
                <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                <property name="label" translatable="yes">_File</property>
                <property name="use_underline">True</property>
                <child>
                  <widget class="GtkMenu" id="menu1">
                    <property name="visible">True</property>
                    <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                    <child>
                      <widget class="GtkImageMenuItem" id="imagemenuitem5">
                        <property name="visible">True</property>
                        <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                        <property name="label" translatable="yes">gtk-quit</property>
                        <property name="use_underline">True</property>
                        <property name="use_stock">True</property>
                        <signal name="activate" handler="on_btnQuit_clicked"/>
                      </widget>
                    </child>
                  </widget>
                </child>
              </widget>
            </child>
            <child>
              <widget class="GtkMenuItem" id="menuitem2">
                <property name="visible">True</property>
                <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                <property name="label" translatable="yes">Debug</property>
                <property name="use_underline">True</property>
                <child>
                  <widget class="GtkMenu" id="menu2">
                    <property name="visible">True</property>
                    <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                    <child>
                      <widget class="GtkMenuItem" id="menuitem3">
                        <property name="visible">True</property>
                        <property name="events">GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK</property>
                        <property name="label" translatable="yes">Show debug window</property>
                        <property name="use_underline">True</property>
                        <signal name="activate" handler="on_btnShowDebug_clicked"/>
                      </widget>
                    </child>
                  </widget>
                </child>
              </widget>
            </child>
          </widget>

Which gets translated to the GtkBuilder format:

  <object class="GtkUIManager" id="uimanager1">
    <child>
      <object class="GtkActionGroup" id="actiongroup1">
        <child>
          <object class="GtkAction" id="menuitem1">
            <property name="name">menuitem1</property>
            <property name="label">_File</property>
          </object>
        </child>
        <child>
          <object class="GtkAction" id="imagemenuitem5">
            <property name="stock_id">gtk-quit</property>
            <property name="name">imagemenuitem5</property>
            <signal handler="on_btnQuit_clicked" name="activate"/>
          </object>
        </child>
        <child>
          <object class="GtkAction" id="menuitem2">
            <property name="name">menuitem2</property>
            <property name="label">Debug</property>
          </object>
        </child>
        <child>
          <object class="GtkAction" id="menuitem3">
            <property name="name">menuitem3</property>
            <property name="label">Show debug window</property>
            <signal handler="on_btnShowDebug_clicked" name="activate"/>
          </object>
        </child>
      </object>
    </child>
    <ui>
      <menubar name="menubar1">
        <menu action="menuitem1">
          <menuitem action="imagemenuitem5"/>
        </menu>
        <menu action="menuitem2">
          <menuitem action="menuitem3"/>
        </menu>
      </menubar>
    </ui>
  </object>


Steps to reproduce:


Actual results:


Expected results:


Does this happen every time?


Other information: