diff -r dfcb64f51f7b -r 3fdd418be9f8 Lib/tkinter/__init__.py
--- a/Lib/tkinter/__init__.py	Wed Jun 05 12:20:24 2013 +0200
+++ b/Lib/tkinter/__init__.py	Wed Jun 05 14:19:24 2013 +0200
@@ -3299,6 +3299,7 @@
 
 class Image:
     """Base class for images."""
+    TclError = TclError  # neede for proper destruction
     _last_id = 0
     def __init__(self, imgtype, name=None, cnf={}, master=None, **kw):
         self.name = None
@@ -3327,7 +3328,9 @@
         if self.name:
             try:
                 self.tk.call('image', 'delete', self.name)
-            except TclError:
+            # This destructor may be called while the global TclError has
+            # already been deleted, so we keep our own reference to it.
+            except self.TclError:
                 # May happen if the root was destroyed
                 pass
     def __setitem__(self, key, value):
diff -r dfcb64f51f7b -r 3fdd418be9f8 Lib/turtledemo/__main__.py
--- a/Lib/turtledemo/__main__.py	Wed Jun 05 12:20:24 2013 +0200
+++ b/Lib/turtledemo/__main__.py	Wed Jun 05 14:19:24 2013 +0200
@@ -57,14 +57,14 @@
         #################
         self.left_frame = left_frame = Frame(root)
         self.text_frame = text_frame = Frame(left_frame)
-        self.vbar = vbar =Scrollbar(text_frame, name='vbar')
+        self.vbar = vbar = Scrollbar(text_frame, name='vbar')
         self.text = text = Text(text_frame,
                                 name='text', padx=5, wrap='none',
                                 width=45)
         vbar['command'] = text.yview
         vbar.pack(side=LEFT, fill=Y)
         #####################
-        self.hbar = hbar =Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
+        self.hbar = hbar = Scrollbar(text_frame, name='hbar', orient=HORIZONTAL)
         hbar['command'] = text.xview
         hbar.pack(side=BOTTOM, fill=X)
         #####################
@@ -80,6 +80,8 @@
         text_frame.pack(side=LEFT, fill=BOTH, expand=0)
         left_frame.pack(side=LEFT, fill=BOTH, expand=0)
         self.graph_frame = g_frame = Frame(root)
+        g_frame.grid_columnconfigure(0, weight=1)
+        g_frame.grid_rowconfigure(0, weight=1)
 
         turtle._Screen._root = g_frame
         turtle._Screen._canvas = turtle.ScrolledCanvas(g_frame, 800, 600, 1000, 800)
@@ -92,7 +94,7 @@
         #xturtle.RawTurtle.canvases = [self.scanvas]
         turtle.RawTurtle.screens = [_s_]
 
-        self.scanvas.pack(side=TOP, fill=BOTH, expand=1)
+        self.scanvas.grid(row=0, column=0, sticky='news')
 
         self.btn_frame = btn_frame = Frame(g_frame, height=100)
         self.start_btn = Button(btn_frame, text=" START ", font=btnfont, fg = "white",
@@ -105,7 +107,7 @@
                                 disabledforeground = "#fed", command = self.clearCanvas)
         self.clear_btn.pack(side=LEFT, fill=X, expand=1)
 
-        self.btn_frame.pack(side=TOP, fill=BOTH, expand=0)
+        self.btn_frame.grid(row=1, column=0, sticky='ew')
         self.graph_frame.pack(side=TOP, fill=BOTH, expand=1)
 
         Percolator(text).insertfilter(ColorDelegator())