1.2.0, prerelease 10. Ratling duelist.

1) Strength 19, potential 19
2) Drink two blessed Potions of Gain Attributes => Strength 21, potential 19(!)
3) Equip Chaos Orb Of Elemental Fire => Strength 31, potential 19
4) Drink Blessed Potion of Potential Strength => Strength 31, potential 31(!)
5) Remove orb => Strength 21, potential 31(!)

So it looks like the potential isn't being calculated correctly in several different scenarios.