Since a while, there is an updated patch from CITI out there: http://www.citi.umich.edu/projects/nfsv4/linux/acl-patches/2.2.42-2/acl-2.2.42-CITI_NFS4_ALL-2.dif This should be applied to the sys-apps/acl package, than the group mapping with NFS4 and acl is working properly. Reproducible: Always
updated in cvs http://sources.gentoo.org/sys-apps/acl/acl-2.2.45.ebuild?r1=1.12&r2=1.13