By default, Koha is configured to have all the subject added entries (600-662) linked to authorities. However, the frameworks included with Koha are missing subfield 9 for fields 648, 654, 655, 656, 657, 658, and 662. Since there is no subfield 9, this breaks authority linking for those headings.
Created attachment 3021 [details] [review] patch
Pushed, please test
This bug is mentioned in: Bug 5619: Subfield 9 missing from most authorised heading fields http://lists.koha-community.org/pipermail/koha-patches/2011-January/013699.html
This works in latest master.