I'm running a 3.5E table for a mix of experienced and new players. The adventure we're running is "Way of the Wicked", which is set for Pathfinder. (To clarify: the players are working with 3.5 rules, and we run the game at 3.5; only the adventure is Pathfinder)
For the first bit, I had just been translating on-the-fly (It wants Perception, OK roll Spot or Listen as appropriate). But last session the party encountered NPCs with class levels, and it became apparent that the Pathfinder versions were significantly up-powered from the player versions (beyond what could be explained by differences in builds and levels and such).
I did some handwaving to avoid a TPK, but since this campaign runs all the way up, I'm concerned that the power differential could get out of hand.
So, what tricks and traps should I beware of when running a Pathfinder adventure under 3.5 rules?