Cast from and to CChar

[Christian Buschmann]

Hi!
I've got following problem. If I enter in ghci following line:
   Prelude Foreign.C> castCCharToChar $ castCharToCChar 'ü'
I would expect that this returns 'ü', but it returns '\252'. Is this the 
correct behaviour? Or am I doing something wrong? Or are there any 
problems with language specific characters and CChar?

thanks
   Christian B.