We have some questions about the management of authorities. We are running Koha 3.00 and the manual have not to much lines about authorities. We have: Home › Administration › System Preferences > Authorities > BiblioAddsAuthorities = OFF Home › Administration › System Preferences > Authorities > dontmerge = ON 1) Are there plans to implement a Z39.50 client for authorities on Koha? 2) Why sometimes authority search works and sometimes not? The authority records actually are in the mysql database. 3) When I delete a duplicated authority record and I search a term of this record I get an error screen. In fact, before I deleted some duplicated authorities I could do successful authority searches, later I get an error screen, then I run rebuild_nozebra.pl. Now, there is not error screen but authority search don't work. Why? Thank you in advance, Alejandro Tiraboschi FaMAF Universidad Nacional de Cordoba Argentina OPAC: biblio.famaf.unc.edu.ar