Unicode error when executing 'rst3' command.

I am opening a bug for this, since I think that a Leo-Newbie might not be
able to find a work around for this issue.

The 'rst3' command just fails silently - and - does not create any output
file at all. - It took me a while to find the offending section in the body
of a large outline node, so that the 'rst3' command was able to create
an output file again.

<log>

D:\Users\Viktor Ransmayr\Documents>leo ./BR-2012-01-28.leo

** isPython3: True
Leo 4.9.1 devel, build 4950, 2012-01-28 10:16:45
Python 3.2.2, qt version 4.8.0
Windows 6, 1, 7601, 2, Service Pack 1
reading settings in D:\Branches\leo-editor\leo\config\leoSettings.leo
reading settings in D:\Users\Viktor Ransmayr\.leo\myLeoSettings.leo
reading settings in D:\Users\Viktor Ransmayr\Documents\BR-2012-01-28.leo
wrote recent file: D:\Users\Viktor Ransmayr\.leo\.leoRecentFiles.txt
<string>:179: (WARNING/2) Literal block expected; none found.
Traceback (most recent call last):
  File "D:\Branches\leo-editor\leo\plugins\qtGui.py", line 8689, in eventFilter
    ret = k.masterKeyHandler(event)
  File "D:\Branches\leo-editor\leo\core\leoKeys.py", line 2897, in masterKeyHandler
    done,val = k.doMode(event,state,stroke)
  File "D:\Branches\leo-editor\leo\core\leoKeys.py", line 2973, in doMode
    val = k.callStateFunction(event) # Calls end-command.
  File "D:\Branches\leo-editor\leo\core\leoKeys.py", line 2947, in callStateFunction
    val = k.state.handler(event)
  File "D:\Branches\leo-editor\leo\core\leoKeys.py", line 2010, in fullCommand
    k.callAltXFunction(k.mb_event)
  File "D:\Branches\leo-editor\leo\core\leoKeys.py", line 2056, in callAltXFunction
    func(event)
  File "D:\Branches\leo-editor\leo\core\leoRst.py", line 472, in rst3
    self.processTopTree(self.c.p)
  File "D:\Branches\leo-editor\leo\core\leoRst.py", line 482, in processTopTree

self.processTree(p,ext=None,toString=False,justOneFile=justOneFile)
  File "D:\Branches\leo-editor\leo\core\leoRst.py", line 510, in processTree

self.write_rst_tree(p,ext,fn,toString=toString,justOneFile=justOneFile)
  File "D:\Branches\leo-editor\leo\core\leoRst.py", line 560, in write_rst_tree

self.write_files(ext,fn,callDocutils,toString,writeIntermediateFile)
  File "D:\Branches\leo-editor\leo\core\leoRst.py", line 1749, in write_files
    f.write(s)
  File "C:\Python32\lib\encodings\cp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\u0142' in position
19816: character maps to <undefined>

</log>

This has been re-produced with the latest revision of leo-trunk. - If wanted,
I can send a minimal outline that consistently produces this tracedback.