A thought occurred to me, Paladins and rangers at level 4 have ECL of 0, their spells last x rounds or minutes per level, when a paladin casts bless at level 4 it lasts 0 minutes. I assume there must be a minimum 1 somewhere, but I don't know where it is written, can anyone cite the rule for me?
Actually, in 3.5 Rangers and Paladins had caster levels equal to half of their class levels. Which made me question why they had things like Greater Magic Weapon and such on their lists. Still, they are better off in Pathfinder, like mostly everything else.