pawsplay
Hero
Note that a splash weapon is a "ranged weapon." Note that when throwing at a creature, you use a "ranged touch attack." Note that when throwing at an intersection, you use a "ranged attack."
It draws an AoO because it is a ranged weapon, consistent with my opinion on ray spells. It is a ranged weapon attack, that is resolved as a ranged touch.
You can throw a flask of alchemist’s fire as a splash weapon. Treat this attack as a ranged touch attack with a range increment of 10 feet.
I'm not going to argue it's unambiguous, but it certainly does not conflict with the answer given to this question. According to the Rules Compendium, the FAQ, and at least one reading of the RAW, there is only one AoO for a ranged touch spell. You are free to hold a differing opinion.