diff --git a/wxPython/contrib/ogl/ogl.cpp b/wxPython/contrib/ogl/ogl.cpp
index 9de0ddb93f..3c74a41f61 100644
--- a/wxPython/contrib/ogl/ogl.cpp
+++ b/wxPython/contrib/ogl/ogl.cpp
@@ -172,7 +172,7 @@ PyObject*  wxPyMake_wxShapeEvtHandler(wxShapeEvtHandler* source) {
         // already be a pointer to a Python object that we can use
         // in the OOR data.
         wxShapeEvtHandler* seh = (wxShapeEvtHandler*)source;
-        wxPyClientData* data = (wxPyClientData*)seh->GetClientObject();
+        wxPyOORClientData* data = (wxPyOORClientData*)seh->GetClientObject();
         if (data) {
             target = data->m_obj;
             Py_INCREF(target);
@@ -181,7 +181,7 @@ PyObject*  wxPyMake_wxShapeEvtHandler(wxShapeEvtHandler* source) {
     if (! target) {
         target = wxPyMake_wxObject2(source, FALSE);
         if (target != Py_None)
-            ((wxShapeEvtHandler*)source)->SetClientObject(new wxPyClientData(target));
+            ((wxShapeEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
     }
     return target;
 }
diff --git a/wxPython/contrib/ogl/ogl.i b/wxPython/contrib/ogl/ogl.i
index bdae01992f..dfa1a664a2 100644
--- a/wxPython/contrib/ogl/ogl.i
+++ b/wxPython/contrib/ogl/ogl.i
@@ -221,7 +221,7 @@ PyObject*  wxPyMake_wxShapeEvtHandler(wxShapeEvtHandler* source) {
         // already be a pointer to a Python object that we can use
         // in the OOR data.
         wxShapeEvtHandler* seh = (wxShapeEvtHandler*)source;
-        wxPyClientData* data = (wxPyClientData*)seh->GetClientObject();
+        wxPyOORClientData* data = (wxPyOORClientData*)seh->GetClientObject();
         if (data) {
             target = data->m_obj;
             Py_INCREF(target);
@@ -230,7 +230,7 @@ PyObject*  wxPyMake_wxShapeEvtHandler(wxShapeEvtHandler* source) {
     if (! target) {
         target = wxPyMake_wxObject2(source, FALSE);
         if (target != Py_None)
-            ((wxShapeEvtHandler*)source)->SetClientObject(new wxPyClientData(target));
+            ((wxShapeEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
     }
     return target;
 }
diff --git a/wxPython/contrib/ogl/oglbasic.cpp b/wxPython/contrib/ogl/oglbasic.cpp
index 482538b0b2..c0bc910213 100644
--- a/wxPython/contrib/ogl/oglbasic.cpp
+++ b/wxPython/contrib/ogl/oglbasic.cpp
@@ -1249,7 +1249,7 @@ static PyObject *_wrap_wxPyShapeEvtHandler_Destroy(PyObject *self, PyObject *arg
 }
 
 static void  wxPyShapeEvtHandler__setOORInfo(wxPyShapeEvtHandler *self,PyObject * _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
 static PyObject *_wrap_wxPyShapeEvtHandler__setOORInfo(PyObject *self, PyObject *args, PyObject *kwargs) {
     PyObject * _resultobj;
diff --git a/wxPython/contrib/ogl/oglbasic.i b/wxPython/contrib/ogl/oglbasic.i
index c1f6c83014..2338089016 100644
--- a/wxPython/contrib/ogl/oglbasic.i
+++ b/wxPython/contrib/ogl/oglbasic.i
@@ -99,7 +99,7 @@ public:
     %addmethods { void Destroy() { delete self; } }
     %addmethods {
         void _setOORInfo(PyObject* _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
     }
 
diff --git a/wxPython/src/_extras.py b/wxPython/src/_extras.py
index 708d1fd586..866ab98cf7 100644
--- a/wxPython/src/_extras.py
+++ b/wxPython/src/_extras.py
@@ -647,6 +647,26 @@ def wxPyTypeCast(obj, typeStr):
     return theObj
 
 
+#----------------------------------------------------------------------------
+
+
+class _wxPyDeadObject:
+    """
+    Instances of wx objects that are OOR capable will have their __class__
+    changed to this class when the C++ object is deleted.  This should help
+    prevent crashes due to referencing a bogus C++ pointer.
+    """
+    def __repr__( self ):
+        if not hasattr(self, "_name"):
+            self._name = "[unknown]"
+        return 'wxPython wrapper for deleted %s object!!! Programming logic error' % self._name
+
+    def __getattr__( self, *args ):
+        if not hasattr(self, "_name"):
+            self._name = "[unknown]"
+        raise ValueError, 'Attempt to access attribute of a deleted %s object' % self._name
+
+
 #----------------------------------------------------------------------
 #----------------------------------------------------------------------
 
@@ -763,10 +783,10 @@ class wxPyWidgetTester(wxApp):
         self.frame.Show(true)
 
 #----------------------------------------------------------------------------
-# DO NOT hold any other references to this object.  This is how we know when
-# to cleanup system resources that wxWin is holding.  When this module is
-# unloaded, the refcount on __cleanMeUp goes to zero and it calls the
-# wxApp_CleanUp function.
+# DO NOT hold any other references to this object.  This is how we
+# know when to cleanup system resources that wxWin is holding.  When
+# the sys module is unloaded, the refcount on sys.__wxPythonCleanup
+# goes to zero and it calls the wxApp_CleanUp function.
 
 class __wxPyCleanup:
     def __init__(self):
diff --git a/wxPython/src/export.h b/wxPython/src/export.h
index c0b9c25a67..a38a1c7a67 100644
--- a/wxPython/src/export.h
+++ b/wxPython/src/export.h
@@ -74,6 +74,9 @@ static void wxPyCoreAPI_IMPORT() {
 #define wxArrayString2PyList_helper(a)      (wxPyCoreAPIPtr->p_wxArrayString2PyList_helper(a))
 #define wxArrayInt2PyList_helper(a)         (wxPyCoreAPIPtr->p_wxArrayInt2PyList_helper(a))
 
+#define wxPyClientData_dtor(a)              (wxPyCoreAPIPtr->p_wxPyClientData_dtor(a))
+#define wxPyUserData_dtor(a)                (wxPyCoreAPIPtr->p_wxPyUserData_dtor(a))
+#define wxPyOORClientData_dtor(a)           (wxPyCoreAPIPtr->p_wxPyOORClientData_dtor(a))
 
 // This one is special.  It's the first function called in SWIG generated
 // modules, so we'll use it to also import the API.
diff --git a/wxPython/src/helpers.cpp b/wxPython/src/helpers.cpp
index aa48fa7128..c3c52d2a6e 100644
--- a/wxPython/src/helpers.cpp
+++ b/wxPython/src/helpers.cpp
@@ -295,6 +295,7 @@ void __wxCleanup() {
 static PyObject* wxPython_dict = NULL;
 static PyObject* wxPyPtrTypeMap = NULL;
 
+
 PyObject* __wxSetDictionary(PyObject* /* self */, PyObject* args)
 {
 
@@ -334,6 +335,52 @@ PyObject* __wxSetDictionary(PyObject* /* self */, PyObject* args)
     return Py_None;
 }
 
+//---------------------------------------------------------------------------
+
+void wxPyClientData_dtor(wxPyClientData* self) {
+    wxPyBeginBlockThreads();
+    Py_DECREF(self->m_obj);
+    wxPyEndBlockThreads();
+}
+
+void wxPyUserData_dtor(wxPyUserData* self) {
+    wxPyBeginBlockThreads();
+    Py_DECREF(self->m_obj);
+    wxPyEndBlockThreads();
+}
+
+
+// This is called when an OOR controled object is being destroyed.  Although
+// the C++ object is going away there is no way to force the Python object
+// (and all references to it) to die too.  This causes problems (crashes) in
+// wxPython when a python shadow object attempts to call a C++ method using
+// the now bogus pointer... So to try and prevent this we'll do a little black
+// magic and change the class of the python instance to a class that will
+// raise an exception for any attempt to call methods with it.  See
+// _wxPyDeadObject in _extras.py for the implementation of this class.
+void wxPyOORClientData_dtor(wxPyOORClientData* self) {
+
+    static PyObject* deadObjectClass = NULL;
+
+    wxPyBeginBlockThreads();
+    if (deadObjectClass == NULL) {
+        deadObjectClass = PyDict_GetItemString(wxPython_dict, "_wxPyDeadObject");
+        wxASSERT_MSG(deadObjectClass != NULL, wxT("Can't get _wxPyDeadObject class!"));
+        Py_INCREF(deadObjectClass);
+    }
+
+    // Clear the instance's dictionary, put the name of the old class into the
+    // instance, and then reset the class to be the dead class.
+    if (self->m_obj->ob_refcnt > 1) {  // but only if there is more than one reference
+        wxASSERT_MSG(PyInstance_Check(self->m_obj), wxT("m_obj not an instance!?!?!"));
+        PyInstanceObject* inst = (PyInstanceObject*)self->m_obj;
+        PyDict_Clear(inst->in_dict);
+        PyDict_SetItemString(inst->in_dict, "_name", inst->in_class->cl_name);
+        inst->in_class = (PyClassObject*)deadObjectClass;
+        Py_INCREF(deadObjectClass);
+    }
+    wxPyEndBlockThreads();
+}
 
 //---------------------------------------------------------------------------
 // Stuff used by OOR to find the right wxPython class type to return and to
@@ -344,6 +391,7 @@ PyObject* __wxSetDictionary(PyObject* /* self */, PyObject* args)
 // is not the same as the shadow class name, for example wxPyTreeCtrl
 // vs. wxTreeCtrl.  It needs to be referenced in Python as well as from C++,
 // so we'll just make it a Python dictionary in the wx module's namespace.
+// (See __wxSetDictionary)
 void wxPyPtrTypeMap_Add(const char* commonName, const char* ptrName) {
     if (! wxPyPtrTypeMap)
         wxPyPtrTypeMap = PyDict_New();
@@ -379,7 +427,7 @@ PyObject*  wxPyMake_wxObject(wxObject* source, bool checkEvtHandler) {
         if (checkEvtHandler && wxIsKindOf(source, wxEvtHandler)) {
             isEvtHandler = TRUE;
             wxEvtHandler* eh = (wxEvtHandler*)source;
-            wxPyClientData* data = (wxPyClientData*)eh->GetClientObject();
+            wxPyOORClientData* data = (wxPyOORClientData*)eh->GetClientObject();
             if (data) {
                 target = data->m_obj;
                 Py_INCREF(target);
@@ -400,9 +448,9 @@ PyObject*  wxPyMake_wxObject(wxObject* source, bool checkEvtHandler) {
             if (info) {
                 target = wxPyConstructObject(source, name, klass, FALSE);
                 if (target && isEvtHandler)
-                    ((wxEvtHandler*)source)->SetClientObject(new wxPyClientData(target));
+                    ((wxEvtHandler*)source)->SetClientObject(new wxPyOORClientData(target));
             } else {
-                wxString msg("wxPython class not found for ");
+                wxString msg(wxT("wxPython class not found for "));
                 msg += source->GetClassInfo()->GetClassName();
                 PyErr_SetString(PyExc_NameError, msg.mbc_str());
                 target = NULL;
@@ -423,7 +471,7 @@ PyObject*  wxPyMake_wxSizer(wxSizer* source) {
         // already be a pointer to a Python object that we can use
         // in the OOR data.
         wxSizer* sz = (wxSizer*)source;
-        wxPyClientData* data = (wxPyClientData*)sz->GetClientObject();
+        wxPyOORClientData* data = (wxPyOORClientData*)sz->GetClientObject();
         if (data) {
             target = data->m_obj;
             Py_INCREF(target);
@@ -432,7 +480,7 @@ PyObject*  wxPyMake_wxSizer(wxSizer* source) {
     if (! target) {
         target = wxPyMake_wxObject(source, FALSE);
         if (target != Py_None)
-            ((wxSizer*)source)->SetClientObject(new wxPyClientData(target));
+            ((wxSizer*)source)->SetClientObject(new wxPyOORClientData(target));
     }
     return target;
 }
diff --git a/wxPython/src/helpers.h b/wxPython/src/helpers.h
index 50ba510883..4ec75ec534 100644
--- a/wxPython/src/helpers.h
+++ b/wxPython/src/helpers.h
@@ -101,6 +101,9 @@ bool wxRealPoint_helper(PyObject* source, wxRealPoint** obj);
 bool wxRect_helper(PyObject* source, wxRect** obj);
 bool wxColour_helper(PyObject* source, wxColour** obj);
 
+//----------------------------------------------------------------------
+// Other helpful stuff
+
 #if PYTHON_API_VERSION < 1009
 #define PySequence_Fast_GET_ITEM(o, i) \
      (PyList_Check(o) ? PyList_GET_ITEM(o, i) : PyTuple_GET_ITEM(o, i))
@@ -113,9 +116,9 @@ bool _4int_seq_helper(PyObject* source, int* i1, int* i2, int* i3, int* i4);
 PyObject* wxArrayString2PyList_helper(const wxArrayString& arr);
 PyObject* wxArrayInt2PyList_helper(const wxArrayInt& arr);
 
-
-#define RETURN_NONE()               { Py_INCREF(Py_None); return Py_None; }
-#define DECLARE_DEF_STRING(name)    static wxString wxPy##name(wx##name)
+#define RETURN_NONE()                 { Py_INCREF(Py_None); return Py_None; }
+#define DECLARE_DEF_STRING(name)      static const wxString wxPy##name(wx##name)
+#define DECLARE_DEF_STRING2(name,val) static const wxString wxPy##name(val)
 
 //----------------------------------------------------------------------
 
@@ -201,6 +204,18 @@ public:
 };
 
 
+
+//----------------------------------------------------------------------
+// Forward decalre a few things used in the exported API
+class wxPyClientData;
+class wxPyUserData;
+class wxPyOORClientData;
+
+void wxPyClientData_dtor(wxPyClientData* self);
+void wxPyUserData_dtor(wxPyUserData* self);
+void wxPyOORClientData_dtor(wxPyOORClientData* self);
+
+
 //---------------------------------------------------------------------------
 // Export a C API in a struct.  Other modules will be able to load this from
 // the wxc module and will then have safe access to these functions, even if
@@ -256,12 +271,70 @@ struct wxPyCoreAPI {
     void        (*p_wxPyPtrTypeMap_Add)(const char* commonName, const char* ptrName);
     PyObject*   (*p_wxArrayString2PyList_helper)(const wxArrayString& arr);
     PyObject*   (*p_wxArrayInt2PyList_helper)(const wxArrayInt& arr);
+
+    void        (*p_wxPyClientData_dtor)(wxPyClientData*);
+    void        (*p_wxPyUserData_dtor)(wxPyUserData*);
+    void        (*p_wxPyOORClientData_dtor)(wxPyOORClientData*);
 };
 
 #ifdef wxPyUSE_EXPORT
-static wxPyCoreAPI* wxPyCoreAPIPtr = NULL;  // Each module needs one, but may not use it.
+static wxPyCoreAPI* wxPyCoreAPIPtr = NULL;  // Each module needs one, but doesn't have to use it.
 #endif
 
+
+//---------------------------------------------------------------------------
+
+
+class wxPyUserData : public wxObject {
+public:
+    wxPyUserData(PyObject* obj) {
+        m_obj = obj;
+        Py_INCREF(m_obj);
+    }
+
+    ~wxPyUserData() {
+#ifdef wxPyUSE_EXPORT
+        wxPyCoreAPIPtr->p_wxPyUserData_dtor(this);
+#else
+        wxPyUserData_dtor(this);
+#endif
+    }
+    PyObject* m_obj;
+};
+
+
+class wxPyClientData : public wxClientData {
+public:
+    wxPyClientData(PyObject* obj) {
+        m_obj = obj;
+        Py_INCREF(m_obj);
+    }
+
+    ~wxPyClientData() {
+#ifdef wxPyUSE_EXPORT
+        wxPyCoreAPIPtr->p_wxPyClientData_dtor(this);
+#else
+        wxPyClientData_dtor(this);
+#endif
+    }
+    PyObject* m_obj;
+};
+
+
+class wxPyOORClientData : public wxPyClientData {
+public:
+    wxPyOORClientData(PyObject* obj)
+        : wxPyClientData(obj) {}
+
+    ~wxPyOORClientData() {
+#ifdef wxPyUSE_EXPORT
+        wxPyCoreAPIPtr->p_wxPyOORClientData_dtor(this);
+#else
+        wxPyOORClientData_dtor(this);
+#endif
+    }
+};
+
 //---------------------------------------------------------------------------
 // This class holds an instance of a Python Shadow Class object and assists
 // with looking up and invoking Python callback methods from C++ virtual
@@ -312,53 +385,6 @@ void wxPyCBH_delete(wxPyCallbackHelper* cbh);
 
 
 
-//----------------------------------------------------------------------
-
-class wxPyUserData : public wxObject {
-public:
-    wxPyUserData(PyObject* obj) {
-        m_obj = obj;
-        Py_INCREF(m_obj);
-    }
-
-    ~wxPyUserData() {
-#ifdef wxPyUSE_EXPORT
-        wxPyCoreAPIPtr->p_wxPyBeginBlockThreads();
-        Py_DECREF(m_obj);
-        wxPyCoreAPIPtr->p_wxPyEndBlockThreads();
-#else
-        wxPyBeginBlockThreads();
-        Py_DECREF(m_obj);
-        wxPyEndBlockThreads();
-#endif
-    }
-    PyObject* m_obj;
-};
-
-
-
-class wxPyClientData : public wxClientData {
-public:
-    wxPyClientData(PyObject* obj) {
-        m_obj = obj;
-        Py_INCREF(m_obj);
-    }
-
-    ~wxPyClientData() {
-#ifdef wxPyUSE_EXPORT
-        wxPyCoreAPIPtr->p_wxPyBeginBlockThreads();
-        Py_DECREF(m_obj);
-        wxPyCoreAPIPtr->p_wxPyEndBlockThreads();
-#else
-        wxPyBeginBlockThreads();
-        Py_DECREF(m_obj);
-        wxPyEndBlockThreads();
-#endif
-    }
-    PyObject* m_obj;
-};
-
-
 
 //---------------------------------------------------------------------------
 // These macros are used to implement the virtual methods that should
diff --git a/wxPython/src/msw/gdi.py b/wxPython/src/msw/gdi.py
index eda13bc5ec..9ab2cec48f 100644
--- a/wxPython/src/msw/gdi.py
+++ b/wxPython/src/msw/gdi.py
@@ -866,14 +866,14 @@ class wxBufferedDC(wxBufferedDCPtr):
     def __init__(self,*_args,**_kwargs):
         self.this = apply(gdic.new_wxBufferedDC,_args,_kwargs)
         self.thisown = 1
-        self._dc = _args[0] # save a ref so it won't be deleted before self
+        self._dc = _args[0] # save a ref so the other dc won't be deleted before self
 
 
 
 def wxBufferedDCInternalBuffer(*_args,**_kwargs):
     val = wxBufferedDCPtr(apply(gdic.new_wxBufferedDCInternalBuffer,_args,_kwargs))
     val.thisown = 1
-    val._dc = _args[0] # save a ref so it won't be deleted before self
+    val._dc = _args[0] # save a ref so the other dc won't be deleted before self
     return val
 
 
diff --git a/wxPython/src/msw/sizers.cpp b/wxPython/src/msw/sizers.cpp
index 5bddf40caf..bc740b04cf 100644
--- a/wxPython/src/msw/sizers.cpp
+++ b/wxPython/src/msw/sizers.cpp
@@ -860,7 +860,7 @@ static void *SwigwxSizerTowxObject(void *ptr) {
 }
 
 static void  wxSizer__setOORInfo(wxSizer *self,PyObject * _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
 static PyObject *_wrap_wxSizer__setOORInfo(PyObject *self, PyObject *args, PyObject *kwargs) {
     PyObject * _resultobj;
diff --git a/wxPython/src/msw/utils.cpp b/wxPython/src/msw/utils.cpp
index 4475235a09..657cefed9c 100644
--- a/wxPython/src/msw/utils.cpp
+++ b/wxPython/src/msw/utils.cpp
@@ -55,14 +55,13 @@ extern PyObject *SWIG_newvarlink(void);
 
 #define SWIG_name    "utilsc"
 
-#include "export.h"
+#include "helpers.h"
 #include <wx/config.h>
 #include <wx/fileconf.h>
 #include <wx/datetime.h>
 
     // Put some wx default wxChar* values into wxStrings.
-    static const wxChar* wxDateFormatStr = wxT("sashWindow");
-    DECLARE_DEF_STRING(DateFormatStr);
+    DECLARE_DEF_STRING2(DateFormatStr, wxT("sashWindow"));
     static const wxString wxPyEmptyString(wxT(""));
 
 
diff --git a/wxPython/src/msw/windows.cpp b/wxPython/src/msw/windows.cpp
index 228779aa2b..93f30a99af 100644
--- a/wxPython/src/msw/windows.cpp
+++ b/wxPython/src/msw/windows.cpp
@@ -548,7 +548,7 @@ static PyObject *_wrap_wxEvtHandler_Disconnect(PyObject *self, PyObject *args, P
 }
 
 static void  wxEvtHandler__setOORInfo(wxEvtHandler *self,PyObject * _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
 static PyObject *_wrap_wxEvtHandler__setOORInfo(PyObject *self, PyObject *args, PyObject *kwargs) {
     PyObject * _resultobj;
diff --git a/wxPython/src/msw/wx.cpp b/wxPython/src/msw/wx.cpp
index fe8e6ac8c3..7d73f40df8 100644
--- a/wxPython/src/msw/wx.cpp
+++ b/wxPython/src/msw/wx.cpp
@@ -677,7 +677,11 @@ static wxPyCoreAPI API = {
     wxPyMake_wxSizer,
     wxPyPtrTypeMap_Add,
     wxArrayString2PyList_helper,
-    wxArrayInt2PyList_helper
+    wxArrayInt2PyList_helper,
+
+    wxPyClientData_dtor,
+    wxPyUserData_dtor,
+    wxPyOORClientData_dtor
 };
 
 
diff --git a/wxPython/src/msw/wx.py b/wxPython/src/msw/wx.py
index 2cc382ee35..35e1ba43d2 100644
--- a/wxPython/src/msw/wx.py
+++ b/wxPython/src/msw/wx.py
@@ -1554,6 +1554,26 @@ def wxPyTypeCast(obj, typeStr):
     return theObj
 
 
+#----------------------------------------------------------------------------
+
+
+class _wxPyDeadObject:
+    """
+    Instances of wx objects that are OOR capable will have their __class__
+    changed to this class when the C++ object is deleted.  This should help
+    prevent crashes due to referencing a bogus C++ pointer.
+    """
+    def __repr__( self ):
+        if not hasattr(self, "_name"):
+            self._name = "[unknown]"
+        return 'wxPython wrapper for deleted %s object!!! Programming logic error' % self._name
+
+    def __getattr__( self, *args ):
+        if not hasattr(self, "_name"):
+            self._name = "[unknown]"
+        raise ValueError, 'Attempt to access attribute of a deleted %s object' % self._name
+
+
 #----------------------------------------------------------------------
 #----------------------------------------------------------------------
 
@@ -1670,10 +1690,10 @@ class wxPyWidgetTester(wxApp):
         self.frame.Show(true)
 
 #----------------------------------------------------------------------------
-# DO NOT hold any other references to this object.  This is how we know when
-# to cleanup system resources that wxWin is holding.  When this module is
-# unloaded, the refcount on __cleanMeUp goes to zero and it calls the
-# wxApp_CleanUp function.
+# DO NOT hold any other references to this object.  This is how we
+# know when to cleanup system resources that wxWin is holding.  When
+# the sys module is unloaded, the refcount on sys.__wxPythonCleanup
+# goes to zero and it calls the wxApp_CleanUp function.
 
 class __wxPyCleanup:
     def __init__(self):
diff --git a/wxPython/src/sizers.i b/wxPython/src/sizers.i
index a43993df98..1e65076ff9 100644
--- a/wxPython/src/sizers.i
+++ b/wxPython/src/sizers.i
@@ -97,7 +97,7 @@ public:
 
     %addmethods {
         void _setOORInfo(PyObject* _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
     }
 
diff --git a/wxPython/src/utils.i b/wxPython/src/utils.i
index ada7c8ad11..24a33a10ef 100644
--- a/wxPython/src/utils.i
+++ b/wxPython/src/utils.i
@@ -14,7 +14,7 @@
 %module utils
 
 %{
-#include "export.h"
+#include "helpers.h"
 #include <wx/config.h>
 #include <wx/fileconf.h>
 #include <wx/datetime.h>
@@ -23,8 +23,7 @@
 //---------------------------------------------------------------------------
 %{
     // Put some wx default wxChar* values into wxStrings.
-    static const wxChar* wxDateFormatStr = wxT("sashWindow");
-    DECLARE_DEF_STRING(DateFormatStr);
+    DECLARE_DEF_STRING2(DateFormatStr, wxT("sashWindow"));
     static const wxString wxPyEmptyString(wxT(""));
 
 %}
diff --git a/wxPython/src/windows.i b/wxPython/src/windows.i
index a79cea8664..10778765a6 100644
--- a/wxPython/src/windows.i
+++ b/wxPython/src/windows.i
@@ -87,7 +87,7 @@ public:
 
     %addmethods {
         void _setOORInfo(PyObject* _self) {
-            self->SetClientObject(new wxPyClientData(_self));
+            self->SetClientObject(new wxPyOORClientData(_self));
         }
     }
 };
diff --git a/wxPython/src/wx.i b/wxPython/src/wx.i
index f51a623b6d..351c6e4bb1 100644
--- a/wxPython/src/wx.i
+++ b/wxPython/src/wx.i
@@ -202,7 +202,11 @@ static wxPyCoreAPI API = {
     wxPyMake_wxSizer,
     wxPyPtrTypeMap_Add,
     wxArrayString2PyList_helper,
-    wxArrayInt2PyList_helper
+    wxArrayInt2PyList_helper,
+
+    wxPyClientData_dtor,
+    wxPyUserData_dtor,
+    wxPyOORClientData_dtor
 };