To reproduce this bug: - Do a search in pro interface - On the result page, click on a biblio record title - On detail page, click on MARC tab if not already selected - Click on Add to > Cart Nothing happens. This is due to the fact that cat-toolbar.inc JavaScript is broken when called from MARCdetail.tt rather than detail.tt. Bug 9780 introduced two new variables countorder, and countdeletedorders, which are populated by detail.pl but not by MARCdetail.pl.
Same issue on ISBD tab: ISBDdetail.pl.
Corrected by Bug 11829 no ?
Works on current master.