What about this example?
>>> from xml.dom import minidom
>>> doc = minidom.Document()
>>> el = doc.createElement("Test")
>>> el.setAttribute("with space", "False")
>>> doc.appendChild(el)
<DOM Element: Test at 0xba1440>
>>>
>>> #nahhh
... minidom.parseString(doc.toxml())
Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
  File "C:\Python26\lib\xml\dom\minidom.py", line 1928, in parseString
    return expatbuilder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 940, in parseString
    return builder.parseString(string)
  File "C:\Python26\lib\xml\dom\expatbuilder.py", line 223, in parseString
    parser.Parse(string, True)
xml.parsers.expat.ExpatError: not well-formed (invalid token): line 1, column 33

>>>

Is it worth making another bug report?