Hi, If you're writing a patch that fixes a bug with an OPAC template file, you'll need to at least touch the Bootstrap theme, but you may also want to touch the prog theme if you think the fix should be backported back to 3.12.x or earlier. Here's my suggestion: if you do that, please put your prog and Bootstrap template changes in separate patches. That way, it will be easier for the RMaints for 3.12.x, 3.10.x, and 3.8.x to cherry-pick the appropriate patches without having to manually disentangle out the Bootstrap theme bits that don't apply. This, in turn, will likely increase the chance of your bugfix being backported. Regards, Galen -- Galen Charlton Manager of Implementation Equinox Software, Inc. / The Open Source Experts email: gmc@esilibrary.com direct: +1 770-709-5581 cell: +1 404-984-4366 skype: gmcharlt web: http://www.esilibrary.com/ Supporting Koha and Evergreen: http://koha-community.org & http://evergreen-ils.org