Well... I reviewed my notes and I *did* notice the AFL clause, I just didn't realise all it's implications.
I didn't mind it giving end _users_ the rights to the source, but I hadn't realised the possibility of creating a share inequality by possibly requiring me to receive enhancements under tighter obligations than which I had originally shared under.
Such are the intricacies, and I should have noticed.
So... I still don't like the GPL3 now and that's a shame.
Ah well.
Sam