Microsoft Windows XP [Verze 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\prg\Python30\Lib\idlelib>svn update    # from 
http://svn.python.org/projects/python/branches/py3k/Lib/idlelib
Restored 'AutoCompleteWindow.py'
Restored 'ToolTip.py'
Restored 'UndoDelegator.py'
Restored 'Bindings.py'
Restored '__init__.py'
Restored 'AutoComplete.py'
Restored 'configHandler.py'
Restored 'HyperParser.py'
Restored 'ColorDelegator.py'
Restored 'Delegator.py'
Restored 'ObjectBrowser.py'
Restored 'testcode.py'
Restored 'configSectionNameDialog.py'
Restored 'ZoomHeight.py'
Restored 'PyShell.py'
Restored 'ParenMatch.py'
Restored 'config-keys.def'
Restored 'Debugger.py'
Restored 'CREDITS.txt'
Restored 'configDialog.py'
Restored 'StackViewer.py'
Restored 'HISTORY.txt'
Restored 'SearchEngine.py'
Restored 'ReplaceDialog.py'
Restored 'ScriptBinding.py'
Restored 'ChangeLog'
Restored 'tabbedpages.py'
Restored 'keybindingDialog.py'
Restored 'configHelpSourceEdit.py'
Restored 'WidgetRedirector.py'
Restored 'GrepDialog.py'
Restored 'FormatParagraph.py'
Restored 'EditorWindow.py'
Restored 'help.txt'
Restored 'config-highlight.def'
Restored 'PyParse.py'
Restored 'README.txt'
Restored 'rpc.py'
Restored 'OutputWindow.py'
Restored 'aboutDialog.py'
Restored 'idle.bat'
Restored 'TODO.txt'
Restored 'config-main.def'
Restored 'IdleHistory.py'
Restored 'PathBrowser.py'
Restored 'IOBinding.py'
Restored 'WindowList.py'
Restored 'ScrolledList.py'
Restored 'ClassBrowser.py'
Restored 'FileList.py'
Restored 'CallTips.py'
Restored 'idle.py'
Restored 'CodeContext.py'
Restored 'textView.py'
Restored 'SearchDialogBase.py'
Restored 'CallTipWindow.py'
Restored 'SearchDialog.py'
Restored 'RemoteObjectBrowser.py'
Restored 'idlever.py'
Restored 'RemoteDebugger.py'
Restored 'TreeWidget.py'
Restored 'NEWS.txt'
Restored 'idle.pyw'
Restored 'run.py'
Restored 'config-extensions.def'
Restored 'AutoExpand.py'
Restored 'Percolator.py'
Restored 'dynOptionMenuWidget.py'
Restored 'extend.txt'
Restored 'MultiStatusBar.py'
Restored 'MultiCall.py'
Restored 'macosxSupport.py'
At revision 68230.

C:\prg\Python30\Lib\idlelib>patch < conv.diff
patching file IOBinding.py

C:\prg\Python30\Lib\idlelib>patch < idle_encoding_4.patch
patching file ScriptBinding.py
patching file IOBinding.py

-------------

Run IDLE - Open cp1250.py - confirm converting to utf8 - F5 (immediately, no change in code!) - error: see attached file
idleunicode1.jpg

All the other python code base is clean 3.0.
xpsp3