'lo,
As the title states, new anchoring system + "fixed size" option on UIRoot respects the positioning of the widgets (sprite + buttons in my case). Upon compiling on an iPad 3 and iPhone 5, the anchors will only align correctly if the aspect ratio of the camera has been set to it's respecting dimensions. For example, if I choose 16:9 in the Game View dropdown, my UI will scale and position properly on the iPhone 5, but will go out of bounds on the 4:3 ratio on the iPad.
Seems that the camera's aspect ratio is not being updated upon compilation, anyone more clever than I (ArenMook?) can give me a clue on how to solve this?