## Changes since release 9.19

- Bundled version of HDF5 updated to 1.8.20.

- mmCIF models now contain metadata consistent with the draft MA mmCIF extension, describing the modeling procedure, custom restraints, templates used, and the alignment.

- Information on the Python script used is now output in the model headers.

- If multi-chain templates are used, information is output on each chain in the model headers (previously only one entry was emitted, for the entire template sequence).

- Bugfix: certain pathological inputs could cause surface area calculation to segfault due to an internal overflow. This is now handled more cleanly.

- Bugfix: model.assess_ga341() now reports an error (rather than segfaulting) if asked to assess a DNA or RNA chain.

- Bugfix: environ.dendrogram() no longer fails with an internal error if given only a single sequence.