in http://bugs.python.org/issue12204
Marc-Andre Lemburg wrote:
I suggest to close this ticket as invalid or to add a note
to the documentation explaining how the mapping is applied
(and when not).

this problem is another
str.capitalize makes the first character big, but it doesn't make the rest small
clearing documentation is not enough

lowering works
>>> '\u1ffc'
'ῼ'
>>> '\u1ffc'.lower()
'ῳ'
>>>