Paizo is doing a second printing of the APG. That means the official errata is now out. The errata can be found at https://secure.paizo.com/download/pathfinder/AdvancedPlayersGuideErrata1_0.zip.
We now have the answer to the Warrior of the Holy Light debate. It turns out I was right. :)
The second paragraph of Power of Faith now reads:
At 4th level, the warrior of the holy light gains one additional use of her lay on hands ability per day. She gains one additional use of lay on hands per day for every four levels she attains beyond 4th. She can spend a use of her lay on hands ability to call upon the power of her faith as a standard action. This causes a nimbus of light to emanate from the warrior of the holy light in a 30-foot radius. All allies in this area (including the warrior of the holy light) receive a +1 morale bonus to AC and on attack rolls, damage rolls, and saving throws against fear as long as they remain in the area of light. This power lasts for 1 minute.