Hi all, I'm still investigating, but it seems to me that the C4::Linker::Default in C4::Biblio::LinkBibHeadingsToAuthorities isn't searching accurately using C4::Heading::authorities. I'm looking at C4::AuthoritiesMarc::SearchAuthorities and at a glance it looks OK, but in practice I think that my search queries are getting way too many results. By hand, if I try the following query: Match-heading,phr,ext,do-not-truncate="e" I get a huge number of results, which is odd, since that should be an "exact" match. I've opened https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=27198 because I need to improve the diagnostics available for a Zebra authorities database, but yeah. not good. Hopefully I'll know more soon. David Cook Software Engineer Prosentient Systems Suite 7.03 6a Glen St Milsons Point NSW 2061 Australia Office: 02 9212 0899 Online: 02 8005 0595