I get Unable to load any usable ISO8859 font trying to launch many programs.

Warning: Cannot convert string "-*-helvetica-medium-r-*-*-12-*-*-*-*-*-iso8859-1" to type FontStruct

I've search on web, found many topics about this - but no fix.

Any help appreciated - Thanks.

Knoppix 3.2 (Debian) DVD Edition
XFree86 4.3.0
gcc version 3.3 (Debian)