I have exactly the same error: > ldap...[19/Apr/2009:06:46:14 -0400] - Unable to access nsslapd-rundir: > Bad address In my case this is nothing to do with the upgrade to CentOS 5.3 (which went smoothly). Instead it is when I upgrade to fedora-ds-base-1.2.0 from fedora-ds-base-1.1.3-2. It does not seem to make any difference what the permissions are on the /var/run/dirsrv directory. To show this I have made the directory world writable and I still get the error. At the moment the permissions are: ls -ld /var/run/dirsrv drwxrwxrwx 2 ldap root 4096 Apr 20 18:09 /var/run/dirsrv Previously it was 750 Any other ideas? Andy PS I am running a production system so I have had to revert to 1.1.3 until this is fixed.