R. David Murray added the comment:

Right, and the unicode consortium says that that weird thing 3.3 is doing is 
the "canonical" lowercasing, and this is the case exactly because in 3.3 
"\u0130".lower().upper() == "\u0130".  Which I why I asked Ezio if we ever came 
up with a way to do lower/upper in a locale specific manner.

The behavior change is an issue, but I'm thinking the 3.3 behavior is probably 
the "correct" behavior per the unicode standard.

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue17252>
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