(I found one email, no response, from 21 May 2014 on this subject; can't find anything 'DateUtils' with either 'Zebra' or 'catalog' in bugs.koha-community.org.) It's extremely rare nowadays that we do a complete re-index on the production servers, but I did one today after a direct (naughty me) tweak to MySQL (frameworks/itemtypes) to avoid a lengthy sandbox<==>production to and fro. I got the following: koha_account@my_production:/usr/share/koha$ ./bin/migration_tools/rebuild_zebra.pl -b -r -v -x given is experimental at /usr/share/koha/lib/Koha/DateUtils.pm line 114. when is experimental at /usr/share/koha/lib/Koha/DateUtils.pm line 115. when is experimental at /usr/share/koha/lib/Koha/DateUtils.pm line 118. when is experimental at /usr/share/koha/lib/Koha/DateUtils.pm line 121. Smartmatch is experimental at /usr/share/koha/lib/C4/Search.pm line 492. Useless use of '\'; doesn't escape metacharacter '(' at /usr/share/koha/lib/C4/AuthoritiesMarc.pm line 917. Just thought I'd ask if anyone has any thoughts on this as I'm fairly sure I've never seen it before -- note, it doesn't *appear* to hurt anything. Tnx and regards -- Paul