Dear Michael, some Debian users have reported a problem with the version of your package g-brief as currently found on CTAN, see also http://bugs.debian.org/423919. Norbert Preining has analysed this and proposed a solution:
,---- | As I see in g-brief.cls there are two places of definition of Telefon: | The first in line 201 where also \Telefax etc is defined, and a | second one *after* (optionally) loading the marvosym.sty: | \IfFileExists{marvosym.sty} | {\RequirePackage{marvosym}} | {} | \def\Telefon#1{\def\telefon{#1}} \def\telefon{} | | So I guess that the first one should be removed, as it seems that you | already thought of this problem. `---- -- Frank Küster Single Molecule Spectroscopy, Protein Folding @ Inst. f. Biochemie, Univ. Zürich Debian Developer (teTeX/TeXLive)