Energy Armor
Skill Rune - Force Armor
Amount of damage absorbed from a single attack will now cap at 100% of a player’s maximum Life
As you can see here from the recent hotfixes blog that we posted, a change has been made to this ability; it will now only absorb up to 100% of your characters maximum life. This change was made because as most wizards know, this ability was overpowered; Force Armor was the sole reason they could progress through Inferno and in most cases be near invincible.
With this change it will bring wizards more in line with the survivability of the other classes in the game.
Sorry don't know how to post direct blue posts, but this is one from the EU forums.
Basically, they nerfed it down to put Wizards in line with the rest of the classes. DH's also got nerfed in a similar way.