[Haskell-cafe] XMonad.Shell.Prompt and unicode input

Hello, community! I have some strange issue with recent XMonad: with using of standard Shell module it is not possible to use unicode input. It simply freezes up and in console I can observe: Enum.toEnum{Word8} : tag (1092) is outside of bounds (0,255). What function may cause such error indirectly? I looked through the sources - but have no idea where such conversion may have place and why Word8 is used. -- Eugene N Dzhurinsky