Description of problem: When trying to update samba3 to samba4 domain, I've got the followng error: ldb: module version mismatch in ../source4/dsdb/samdb/ldb_modules/acl.c : ldb_version=1.1.6 module_version=1.1.4 ldb: failed to initialise module /usr/lib64/samba/ldb/acl.so : Unavailable Command I was running: samba-tool domain samba3upgrade --dbdir=. --use-xattrs=yes --realm=example.com smb.conf (with samba3 tdb and smb.conf in current directory). Probably it'll fail on provisioning from scratch or other actions. I guess that libldb was updated from 1.1.4 to 1.1.6, but samba4 wasn't rebuilt with new libldb. I've tried to rebuild and it fixes this problem. Version-Release number of selected component (if applicable): samba4-4.0.0-57alpha18.fc17.x86_64 libldb-1.1.6-1.fc17.x86_64