German special characters

[tn fenster <balsa ars-solvendi de>]

Hello,

I noticed the following problem when composing a message: if I try to  
enter a name from my gnomecard-address-file and I have to type one of  
the german special character like äöüß, nothing happens. If I type  
"Müller", only the M occurs. When I start balsa from a terminal, I  
don't get any output.
Is this a problem with my gtk-Version (2.0.6)? I'm running a SuSE-Linux  
8.1 and balsa 2.0.15.

Thanks for any help

Tobias