Ok Dan, fair point, but of the current eight on the new plugin's database, six are children of the topics / weeks formats.
Perhaps it is a trait of PHP that failures are so obvious with a screen that shows or a screen that does not rather than degraded functionality in the face of underlying API changes that indicate the need to make a new release. With the transitions of 2.0, 2.1 to 2.2 the formats that were topics / weeks beased still worked, but with 2.3 the changes were more significant in the transition to polymorphic renderer based API code.
With the desire to move to a new more flexible course format API for Moodle 2.4 as I believe indicated at http://docs.moodle.org/dev/Developer_meeting_May_2012 - what is the best course of action for contributed course format developers to follow?
Is there an official API?
In any event, each contributed format needs to be tested with 2.3 to confirm that it works correctly as expected.
Cheers,
Gareth