Hallo Thomas, this style has been removed from teTeX (and TeXLive, hence the Cc) early this year because it had no license. Meanwhile it has one (CTAN://macros/latex/contrib/a0poster/) and is under LPPL. Will you re-add it? Regards, Frank -- Frank Küster, Biozentrum der Univ. Basel Abt. Biophysikalische Chemie