The team working on the the DBA Frequently Asked Question file have just released an update.
This update provides eight new entries. Perhaps the most notable are those providing clarity around conforming and turning to face when single elements are attacked from the flank and rear. In addition it considers a couple of minor points that periodically are missed, or which occur less frequently.
The most up to date file, available as a PDF, can be found in the “DBA Resources” section of this site.