This problem causes {{{os.getcwdu()}}} to fail when the console code page is set to 65001 (always, I think):
{{{
t:\>ver

Microsoft Windows [Version 6.0.6002]

t:\>chcp
Active code page: 65001

t:\>python -c "import os; print os.getcwdu()"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
LookupError: unknown encoding: cp65001

t:\>chcp 1252
Active code page: 1252

t:\>python -c "import os; print os.getcwdu()"
t:\
}}}

Incidentally, I don't agree that this codepage needs to be distinguished from UTF-8. The deviations in the Microsoft codec are just their bugs. There is only one correct way to encode/decode UTF-8, and cp65001 is supposed to be UTF-8 according to Microsoft (e.g. http://msdn.microsoft.com/en-us/library/86hf4sb8%28en-US,VS.80%29.aspx ).