The pull request in question DRYs up the schema a bit, to move some currency-related code out of the activity and organisation schemas and into the common schema (used by both). This is consistent with other refactoring changes made at v2.03.
It also fixes a minor bug related to custom namespaces. Java programmers may have run into this problem, since xjc gets stuck as a result of this bug (
Unique Particle Attribution error).
If anyone objects to (or supports!) changing the v2.03 schema in this way, speak now! Thanks