-        wxDialog.__init__(self, parent, -1, 'About the wxPython demo',
-                          size=wxSize(420, 380))
-        self.html = wxHtmlWindow(self, -1)
-        self.html.SetPage(self.text % wx.__version__)
-        self.SetAutoLayout(true)
-        lc = wxLayoutConstraints()
-        lc.top.SameAs(self, wxTop, 5)
-        lc.left.SameAs(self, wxLeft, 5)
-        lc.bottom.SameAs(self, wxBottom, 5)
-        lc.right.SameAs(self, wxRight, 5)
-        self.html.SetConstraints(lc)
-        self.Layout()
-
-        self.CentreOnParent(wxBOTH)
+        wx.Dialog.__init__(self, parent, -1, 'About the wxPython demo',)
+        html = wx.html.HtmlWindow(self, -1, size=(420, -1))
+        if "gtk2" in wx.PlatformInfo:
+            html.SetStandardFonts()
+        py_version = sys.version.split()[0]
+        txt = self.text % (wx.VERSION_STRING,
+                           ", ".join(wx.PlatformInfo[1:]),
+                           py_version
+                           )
+        html.SetPage(txt)
+        btn = html.FindWindowById(wx.ID_OK)
+        ir = html.GetInternalRepresentation()
+        html.SetSize( (ir.GetWidth()+25, ir.GetHeight()+25) )
+        self.SetClientSize(html.GetSize())
+        self.CentreOnParent(wx.BOTH)