If at any point your alignment changes to non-lawful good, certain of your paladin abilities will cease to function.
Skills : Paladins Spot and Listen as class skills on top of the ones from the base game.
Modified Abilities :
Smite Evil : This ability is now on an 18-second cooldown with unlimited uses per day.
Lay On Hands : This ability is now on a 1-minute cooldown with unlimited uses per day.
Bonus Feats : Paladins receive Heavy Armor Optimization at level 7, Improved Heavy Armor Optimization at level 14 and Epic Heavy Armor Optimization at level 21, as well as a bonus feat of their choice at level 30.
Spell progression and powerEdit
Paladins get full caster level on their spells, affecting duration and other aspects.
In order to qualify for the feat Craft:Wand, a paladin must have at least 10 levels in paladin. This implies that paladin levels count for 1/2 for qualifying for crafting feats. It is unknown how this interacts with feats and prestige classes which increase caster levels.
They also get an increased number of spells per day, see: Paladin-Ranger Spell Progression