Well... The new version is out!

"TheoraLib(TheoraMovieDecoder DLL) Update&Bugfix. http://d.hatena.ne.jp/Ko-Ta/20090204"

But I still could not talk with the author! I did not find any e-mail adress and tried to talk to him on Twitter (http://twitter.com/#!/k_o_t_a_), but without success! =(