While installing Gentoo 2006.0 on eMac (PPC platform), emerge of fron fails towards the end of the installation phase since its unable to find the 'cron' group. The problem is fixed by doing emerge cronbase before emerge fcron. The installation handbook also needs to be updated.
Hmm, it inherits cron eclass which RDEPENDs on cronbase... Oh well, punting vital groups from baselayout -- really :/
*** This bug has been marked as a duplicate of 113298 ***