Hi, We do not have call numbers assigned to our books, however shelf browsing was working for us pre koha_3_02_03. That is, only the "Browse Shelf" link would show up on the OPAC detail page in the callnumber column. We have only recently noticed that the "Browse Shelf" link is no longer showing up. We suspect the change in bahaviour happened when we upgraded. We have the "OPACShelfBrowser" global system preference set to "on". Here is a sample of our 952 fields: 952 _40 _xvg/vg _err _00 _912232 _bOPIACS _10 _d2011-02-24 _zHow admirals, scientists and politicians impeded the development of high technology in Canada's wartime navy. The reasons were diverse - the limited pre-war infrastructure, poor leadership, nav al conservatism, inadequate international technical liaison and the Admiralty's refusal to give reasonable assistance to the Canadian effort. _8navy_RCN _71 _cbox_rr_fl3 _g20.00 _yBK _aOPIACS As I recall setting 952$a, $b, and $c seemed to get the shelf browsing working (when it was working) even without call numbers. Has anyone had this problem? Are call numbers required for shelf browsing to work? Thanks, Pete. Volunteer with the ACS - http://aandc.org/ -- View this message in context: http://koha.1045719.n5.nabble.com/Shelf-browsing-not-showing-up-after-upgrad... Sent from the Koha - Discuss mailing list archive at Nabble.com.