So in the spell description it advises that Unlike mundane armor, mage armor entails no armor check penalty, arcane spell failure chance, or speed reduction. there Mage Armor spell is the same as armor except no armor check penalty, arcane spell failure chance, or speed reduction.
This means you treat Mage Armor as phsyical armor and it stacks with a shield.
Staldin*Freefall said:Geez, why couldn't Shields just have a Shield bonus and leave it at that?