If you just install samba-client package, the codepages aren't installed and e.g. smbclient complains: load_client_codepage: filename /etc/codepages/codepage.850 does not exist. After that I installed the main samba RPM, and the bug was fixed.
Oops. Looks like we're going to have to split it into samba-server, samba-client, & samba-common, or somesuch.
this will be fixed in the samba RPM in the next Raw Hide release.