Polish gen. Bartosz Stroinski (who had been invited to Moscow as an expert of TU-154) claimed the voice recordings' transcript is not the one he had signed originally at the end of April.
Link to the Russian press - anyone able to comment (I'm not fluent enough in Russian
Lenta.ru: В мире: Польский эксперт заявил о подмене стенограммы с самолета Качиньского