> They started from the 3.1 source, incorporated all bugfixes
> which where adressed by BiongBag 1+2 [...]

I hope they didn't incorporate just all bugfixes addressed by BoingBag 1+2 of AmigaOS 3.9, but also the bugfixes incorporated by AmigaOS 3.5, BoingBag 1+2(a) of AmigaOS 3.5, and Amiga OS 3.9 proper :-)