Please file detailed and specific bugs against 5.x if any APIs have
changed which break contributed modules. This should not happen.

That's fine, but wouldn't it be more expedient to open the scrutiny of the api's to the entire Drupal community? Any one individual (or even a handful of individuals) is going to have a more limited amount of time to research, document, and fix the existing issues with Drupal 5.x-dev than if the entire Drupal 5 user base is looking at things.

I guess I don't understand the reasons for not releasing something at this point. Considering that 5.1 was released within 2 weeks of the 5.0 release, at time frame which could almost be considered as "concurrent" with the 5.0 release given the larger perspective of time, it's not much of a stretch to say that the 5.0 branch has never really been updated since being released (to quibble I guess the more technically correct term is that it's been "hardly" updated).

- Caleb