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
Dumping task configuration parameters now includes documentation
That is, running ${TASK} ... --show config displays not only the names and values of the configuration but also associated documentation.
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Bug Fixes
The following fixes resolve problems visible to end users.
The NaiveDipoleCentroid and NaiveDipoleFlux algorithms no longer require centroids
These algorithms do not use centroids internally, but, since they mistakenly included SelfCentroidExtractors, it was impossible to initialize them unless a Centroid slot had been defined. This has been fixed by removing the SafeCentroidExtractors from the algorithm definitions.
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Correct bad default minInitialRadius for CModel
The minInitialRadius configuration parameter had a default that is too small, causing many galaxies to be fit with point source models, leading to bad star/galaxy classifications.
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Correct algebraic error in CModel uncertainty calculation
There was a simple but important algebra error in the uncertainty calculation, making the uncertainty a strong function of magnitude.
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NaiveDipoleCentroid and NaiveDipoleFlux algorithms no longer require a centroid slot
Previously, initializing these algorithms was only possible if a centroid was already defined. That was not only unneccessary, but also made them more complicated to use, particularly in testing.
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Build and code improvements
These improvements should not usually be visible to end users. They may, however, be important for developers.
Work-around incompatibilities with NumPy 1.10
NumPy 1.10 introduced API changes which were incompatible with existing usage in the stack. The latter has been updated to match
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