[Pharo-dev] Build 739 breaks project load initialization order?

I have a project that loads via Metacello in builds up through build 738. In 739 the load fails with DNU. The failure is in a method I have specified via a #postLoadDoIt:. It fails because it sends a message to a pool variable, which is nil. However, it should not be nil because it should have been initialized by a class-side #initialize method in a prerequisite package. Again, this worked up through build 738. Any idea what changed in 739 that would cause this, and is this change intentional? Thanks, -Martin