diff --git a/mozilla/calendar/lightning/content/messenger-overlay-sidebar.xul b/mozilla/calendar/lightning/content/messenger-overlay-sidebar.xul
index 3717f2f2e46..3ae8aa55e6f 100644
--- a/mozilla/calendar/lightning/content/messenger-overlay-sidebar.xul
+++ b/mozilla/calendar/lightning/content/messenger-overlay-sidebar.xul
@@ -269,6 +269,7 @@
 
   <keyset id="ltnKeys">
     <key id="openLightningKey" modifiers="accel" key="3" observes="switch2calendar"/>
+    <key id="openTasksKey" modifiers="accel" key="4" command="switch2task"/>
     <key id="todaypanekey" command="cmd_toggleTodayPane" keycode="VK_F11"/>
     <key id="newEventKey" key="I" modifiers="accel" command="calendar_new_event_command"/>
     <key id="newTaskKey" key="D" modifiers="accel" command="calendar_new_todo_command"/>
@@ -277,8 +278,6 @@
     <key id="multiweek-view-key" key="3" modifiers="alt" command="calendar_multiweek-view_command"/>
     <key id="month-view-key" key="4" modifiers="alt" command="calendar_month-view_command"/>
     <key id="gotoToday-key" keycode="VK_DOWN" modifiers="accel" command="calendar_go_to_today_command"/>
-    <!-- not yet in use...-->
-    <key id="switchtotask-key" key="4" modifiers="accel"/>
   </keyset>
 
   <popupset id="calendar-popupset">
@@ -312,7 +311,7 @@
                 accesskey="&calendar.context.deleteitem.accesskey;"
                 observes="calendar_delete_event_command"/>
     </popup>
-     <menupopup id="calendar-GoPopupMenu">
+    <menupopup id="calendar-GoPopupMenu">
        <menuitem id="ltnGoToToday"
                  label="&goTodayCmd.label;"
                  accesskey="&goTodayCmd.accesskey;"
@@ -334,12 +333,20 @@
                  accesskey="&lightning.toolbar.calendar.accesskey;"
                  command="switch2calendar"
                  key="openLightningKey"/>
+       <menuitem id="ltnMenu_tasks"
+                 type="radio"
+                 name="modemenu"
+                 checked="false"
+                 label="&lightning.toolbar.task.label;"
+                 accesskey="&lightning.toolbar.task.accesskey;"
+                 command="switch2task"
+                 key="openTasksKey"/>
        <menuseparator id="before-AddressBook"/>
        <menuitem id="addressBook-calendar" label="&addressBookCmd.label;"
-                    accesskey="&addressBookCmd.accesskey;"
-                    key="key_addressbook"
-                    mode="calendar"
-                    oncommand="toAddressBook();"/>
+                 accesskey="&addressBookCmd.accesskey;"
+                 key="key_addressbook"
+                 mode="calendar"
+                 oncommand="toAddressBook();"/>
     </menupopup>    
     <menupopup id="calendarCalendarPopupMenu">
         <menuitem id="ltnNewEvent2" label="&event.new.event;"
@@ -352,7 +359,6 @@
              key="newTaskKey"
              observes="calendar_new_todo_command"
              position="3"/>
-
        <menuseparator id="firstCalendarSeparator" mode="calendar"/>
        <menuitem id="subscribeCalendar"
                  disabled="true"
@@ -377,7 +383,7 @@
                  id="calendarproperties"
                  accesskey="&calendar.properties.accesskey;"
                  observes="calendar_edit_calendar_command"/>
-     </menupopup>
+    </menupopup>
      <menu id="ltnCalendarMenu" label="&lightning.calendar.label;"
         accesskey="&lightning.calendar.accesskey;"
         mode="calendar">