Haste is wrong in the FAQ.
The FAQ states that you get to take an extra partial action the SAME ROUND you cast Haste on yourself. This can't possibly be correct, and I'll tell ya'll why.
Haste lasts for 1 round/level. You are able to benefit from the spell once every round the spell is in effect. In you are 5th level, the duration is 5 rounds. If the duration is 5 rounds you are only allowed 5 extra partial actions.
However, you are allowed an extra partial action on the last round of the spell, but it must be before your standard action. If you were also allowed an extra partial action on the first round, you would get 6 partial actions, not five.
Let's take a look.
You are a 5th level wizard. You cast Haste on yourself and are hasted for 1 round/level, and are therefore hasted for five rounds. You cast the spell on Round 1 of combat, meaning the spell lasts until Round 6 of combat.
If you get an extra partial action on the first round, you get extra partial actions on Rounds 1, 2, 3, 4, 5, and 6. That's 6 partial actions, despite the fact you only get five rounds. The spell does not function like that.
You get the AC bonus immediately, but your first partial action can't be until Round 2. If yanyone thinks this is wrong, try to find ANY other spell that you cast ON YOURSELF that gives you benefits for more turns that the duration in rounds. None exist.
This is a moot point when you cast Haste on other people because the duration begins and ends on the caster's turn, not the recipient's. That only gives further proof of my point however. Watch:
Fighter goes before Wizard in initiative. Wizard casts Haste on Fighter in Round 1. Haste lasts until the Wizard's turn on Round 6. Fighter receives 5 partial actions, one each on Rounds 2-6. If the Wizard had won initiative, the duration would have been the same, but the Fighter still would've gotten 5 partial actions, only now on Rounds 1-5. How could it be that you would get more benefit casting Haste on yourself than on others? Fact is, YOU DON'T.
You receive your partial actions starting the round AFTER you Haste yourself, never on the same round. I think I have successfully proven my point.