At which point do the APs become Pathfinder?

[Rerednaw]

I'm going through some of the older APs and I was wondering at which point was the changeover from 3.5 to Pathfinder made?

I've been reading the player guides several of these older ones sound interesting. I would like to avoid redoing stat blocks and such if possible though.

BTW I started subscribing with Reign of Winter.
I also already own (but haven't read) RotR Anniversary. Yeah I wanted the gorgeous locked tome :)

Thanks!

[Liz Courts]

Council of Thieves is the first Pathfinder RPG Adventure Path—if it says "PFRPG" in the title, it's Pathfinder rules, "OGL" is 3.5 (for Paizo stuff at any rate).

[Solidchaos085]

I can answer that, the first official pathfinder AP was council of thieves, though the first AP, Rise of the Runelords was recently redone as pathfinder. Now if they'd only convert curse of the crimson throne to pf we'd be set.

Edit: ninja'd by Liz (who has the iconic ninja as an avatar, so bonus points)