[Arralen]

1) %-chance of spontanous regrowth of limbs etc. is rolled for every unit independently.

2) Immortals and recuperating units heal afflictions after they got rid of the item. Regenerating units do not heal afflictions.

3) No. Check the order of actions in a turn, manual page ... dunno, it's easy to find.

4) Yes. (and No) Basically, PD is always "fresh" each fight as long as you own the prov. Unit Healing is a seperate from battles, both those caused by spells and by movement.

6) Can't remember seeing units retreat to neighbouring provinces as long as I had a castle. not 100% shure.

7) Mmmh. Maybe. Could be bugged.

8) Berserking units do not retreat. But normal units without leadership do not dissolve. So it's obvious - they keep on fighting while the rest of your armies runs away.
Units who dissolve will to just that - dissolve... .
Vine Men/Ogres are mindless, but neither magical nor undead. They tend to stand around if left without leader, but do not dissolve.

9) Commander. As with any other gem producing item. At least, they should. Haven't checked for ages.

10) Nope. Awe works in melee (range) only. As does fear.