PyRTF-ng 0.9.1 has not parsed any of my RTF documents, both with the ParsingException.
First document was generated with OpenOffice 3.4, the second one with Mac TextEdit.
Pyth 0.5.6 parsed without problems both documents, but has not processed cyrillic symbols properly.
But each editor opens other's editor document correctly and without trouble, so all libraries seems to have a weak rtf support.
So I'm writing my own parser with with blackjack and hookers.
(I've uploaded both files, so you can check RTF libraries by yourself: http://yadi.sk/d/RMHawVdSD8O9 http://yadi.sk/d/RmUaSe5tD8OD)