Gimp crashes because of "umlaute" in the filename!?

[Joerg Desch]

Im using an up-to-date warty with gimp 2.02. If I call gimp with a
filename which contains german special characters (umalute öäüÖÄÜ), it
crashes with the following message:

$ gimp bca-1--Kabelführung.jpg
(script-fu:10376): LibGimpBase-WARNING **: script-fu: wire_read(): error
Speicherzugriffsfehler

What can I do now? locale tells me, that all entries are set to de_DE!

-- 
Email: Joerg Desch <jd DOT vvd AT web DOT de>