diff --git a/include/wx/event.h b/include/wx/event.h
index 38303aaae6..874d42e274 100644
--- a/include/wx/event.h
+++ b/include/wx/event.h
@@ -986,6 +986,9 @@ public:
         m_propagationLevel = propagationLevel;
     }
 
+    // This method is for internal use only and allows to get the object that
+    // is propagating this event upwards the window hierarchy, if any.
+    wxEvtHandler* GetPropagatedFrom() const { return m_propagatedFrom; }
 
     // This is for internal use only and is only called by
     // wxEvtHandler::ProcessEvent() to check whether it's the first time this
@@ -1056,6 +1059,10 @@ protected:
     // the parent window (if any)
     int               m_propagationLevel;
 
+    // The object that the event is being propagated from, initially NULL and
+    // only set by wxPropagateOnce.
+    wxEvtHandler*     m_propagatedFrom;
+
     bool              m_skipped;
     bool              m_isCommandEvent;
 
@@ -1075,7 +1082,7 @@ protected:
     wxEvent& operator=(const wxEvent&); // for derived classes operator=()
 
 private:
-    // it needs to access our m_propagationLevel
+    // It needs to access our m_propagationLevel and m_propagatedFrom fields.
     friend class WXDLLIMPEXP_FWD_BASE wxPropagateOnce;
 
     // and this one needs to access our m_handlerToProcessOnlyIn
@@ -1109,26 +1116,35 @@ private:
 };
 
 /*
- * Another one to temporarily lower propagation level.
+ * Helper used to indicate that an event is propagated upwards the window
+ * hierarchy by the given window.
  */
 class WXDLLIMPEXP_BASE wxPropagateOnce
 {
 public:
-    wxPropagateOnce(wxEvent& event) : m_event(event)
+    // The handler argument should normally be non-NULL to allow the parent
+    // event handler to know that it's being used to process an event coming
+    // from the child, it's only NULL by default for backwards compatibility.
+    wxPropagateOnce(wxEvent& event, wxEvtHandler* handler = NULL)
+        : m_event(event),
+          m_propagatedFromOld(event.m_propagatedFrom)
     {
         wxASSERT_MSG( m_event.m_propagationLevel > 0,
                         wxT("shouldn't be used unless ShouldPropagate()!") );
 
         m_event.m_propagationLevel--;
+        m_event.m_propagatedFrom = handler;
     }
 
     ~wxPropagateOnce()
     {
+        m_event.m_propagatedFrom = m_propagatedFromOld;
         m_event.m_propagationLevel++;
     }
 
 private:
     wxEvent& m_event;
+    wxEvtHandler* const m_propagatedFromOld;
 
     wxDECLARE_NO_COPY_CLASS(wxPropagateOnce);
 };
diff --git a/include/wx/mdi.h b/include/wx/mdi.h
index 78c2f4c3e4..52cbed7da4 100644
--- a/include/wx/mdi.h
+++ b/include/wx/mdi.h
@@ -381,8 +381,18 @@ inline bool wxMDIParentFrameBase::TryBefore(wxEvent& event)
             event.GetEventType() == wxEVT_UPDATE_UI )
     {
         wxMDIChildFrame * const child = GetActiveChild();
-        if ( child && child->ProcessWindowEventLocally(event) )
-            return true;
+        if ( child )
+        {
+            // However avoid sending the event back to the child if it's
+            // currently being propagated to us from it.
+            wxWindow* const
+                from = static_cast<wxWindow*>(event.GetPropagatedFrom());
+            if ( !from || !from->IsDescendant(child) )
+            {
+                if ( child->ProcessWindowEventLocally(event) )
+                    return true;
+            }
+        }
     }
 
     return wxFrame::TryBefore(event);
diff --git a/src/common/event.cpp b/src/common/event.cpp
index 2733450352..c9e8f11bca 100644
--- a/src/common/event.cpp
+++ b/src/common/event.cpp
@@ -369,6 +369,7 @@ wxEvent::wxEvent(int theId, wxEventType commandType)
     m_handlerToProcessOnlyIn = NULL;
     m_isCommandEvent = false;
     m_propagationLevel = wxEVENT_PROPAGATE_NONE;
+    m_propagatedFrom = NULL;
     m_wasProcessed = false;
     m_willBeProcessedAgain = false;
 }
@@ -382,6 +383,7 @@ wxEvent::wxEvent(const wxEvent& src)
     , m_callbackUserData(src.m_callbackUserData)
     , m_handlerToProcessOnlyIn(NULL)
     , m_propagationLevel(src.m_propagationLevel)
+    , m_propagatedFrom(NULL)
     , m_skipped(src.m_skipped)
     , m_isCommandEvent(src.m_isCommandEvent)
     , m_wasProcessed(false)
@@ -400,6 +402,7 @@ wxEvent& wxEvent::operator=(const wxEvent& src)
     m_callbackUserData = src.m_callbackUserData;
     m_handlerToProcessOnlyIn = NULL;
     m_propagationLevel = src.m_propagationLevel;
+    m_propagatedFrom = NULL;
     m_skipped = src.m_skipped;
     m_isCommandEvent = src.m_isCommandEvent;
 
diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index 3c2c0f4e1d..787d08b13f 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -3370,7 +3370,7 @@ bool wxWindowBase::TryAfter(wxEvent& event)
             wxWindow *parent = GetParent();
             if ( parent && !parent->IsBeingDeleted() )
             {
-                wxPropagateOnce propagateOnce(event);
+                wxPropagateOnce propagateOnce(event, this);
 
                 return parent->GetEventHandler()->ProcessEvent(event);
             }