setting locale fails

[Sven Garbade <garbade@psy.uni-muenchen.de>]

Hi there,

running apt-get install bla produces this warning:

perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = (unset),
        LC_ALL = "de_DE",
        LANG = "de_DE"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").

locale sais:
    
LANG=de_DE
LC_CTYPE="de_DE"
LC_NUMERIC="de_DE"
LC_TIME="de_DE"
LC_COLLATE="de_DE"
LC_MONETARY="de_DE"
LC_MESSAGES="de_DE"
LC_PAPER="de_DE"
LC_NAME="de_DE"
LC_ADDRESS="de_DE"
LC_TELEPHONE="de_DE"
LC_MEASUREMENT="de_DE"
LC_IDENTIFICATION="de_DE"
LC_ALL=de_DE

I've installed the package user_de a while ago, but removed it after
some time.
System: Potato.

Thanks, Sven