This is supposed to be 3.9.1. AROS is only equivalent to 3.1, at best, and much less tightly written. So using AROS as a source for a "3.9.1" just won't cut it.
Would you seriously stop talking about what you have no clue about? There's a huge difference between claiming to be 3.1 compliant and being a 3.1 clone. AROS already surpasses 3.1 in many ways.