These draft notes cover the major updates made by Data Release Production to the LSST stack since release 11.0 (Summer 2015). Please record significant updates here so that they can ultimately be incorporated into the notes accompanying the Winter 2016 release.
Major Functionality and Interface Changes
Bug Fixes
The following fixes resolve problems visible to end users.
Build and code improvements
These improvements should not usually be visible to end users. They may, however, be important for developers.