Does a creature with the scent ability who uses their move action to note the direction of a scent provoke an Attack of Opportunity?
The Scent special ability allows that:
When a creature detects a scent, the exact location of the source is not revealed—only its presence somewhere within range. The creature can take a move action to note the direction of the scent. When the creature is within 5 feet of the source, it pinpoints the source’s location.
Scent's description doesn't say one way or the other, and I can't find a general rule like "move actions generally do [not] provoke unless they say otherwise". The description of AoOs says:
Some actions, when performed in a threatened square, provoke attacks of opportunity as you divert your attention from the battle. Table: Actions in Combat notes many of the actions that provoke attacks of opportunity.