diff -r b3fe2ef13470 Lib/tkinter/__init__.py
--- a/Lib/tkinter/__init__.py	Tue Dec 04 09:30:24 2012 +0100
+++ b/Lib/tkinter/__init__.py	Tue Dec 04 14:31:25 2012 +0200
@@ -387,7 +387,7 @@
         background, highlightColor, selectForeground,
         disabledForeground, insertBackground, troughColor."""
         self.tk.call(('tk_setPalette',)
-              + _flatten(args) + _flatten(kw.items()))
+              + _flatten(args) + _flatten(list(kw.items())))
     def tk_menuBar(self, *args):
         """Do not use. Needed in Tk 3.6 and earlier."""
         pass # obsolete since Tk 4.0
diff -r b3fe2ef13470 Lib/tkinter/test/test_tkinter/test_misc.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Lib/tkinter/test/test_tkinter/test_misc.py	Tue Dec 04 14:31:25 2012 +0200
@@ -0,0 +1,45 @@
+import unittest
+import tkinter
+from tkinter import ttk
+from test import support
+
+support.requires('gui')
+
+class MiscTest(unittest.TestCase):
+
+    def setUp(self):
+        self.root = ttk.setup_master()
+
+    def test_tk_setPalette(self):
+        root = self.root
+        root.tk_setPalette('black')
+        self.assertEqual(root['background'], 'black')
+        root.tk_setPalette('white')
+        self.assertEqual(root['background'], 'white')
+        self.assertRaisesRegex(tkinter.TclError,
+                '^unknown color name "spam"$',
+                root.tk_setPalette, 'spam')
+
+        root.tk_setPalette(background='black')
+        self.assertEqual(root['background'], 'black')
+        root.tk_setPalette(background='blue', highlightColor='yellow')
+        self.assertEqual(root['background'], 'blue')
+        self.assertEqual(root['highlightcolor'], 'yellow')
+        root.tk_setPalette(background='yellow', highlightColor='blue')
+        self.assertEqual(root['background'], 'yellow')
+        self.assertEqual(root['highlightcolor'], 'blue')
+        self.assertRaisesRegex(tkinter.TclError,
+                '^unknown color name "spam"$',
+                root.tk_setPalette, background='spam')
+        self.assertRaisesRegex(tkinter.TclError,
+                '^must specify a background color$',
+                root.tk_setPalette, spam='white')
+        self.assertRaisesRegex(tkinter.TclError,
+                '^must specify a background color$',
+                root.tk_setPalette, highlightColor='blue')
+
+
+tests_gui = (MiscTest, )
+
+if __name__ == "__main__":
+    support.run_unittest(*tests_gui)