Here is a new point for the Pathfinder Advanced Players Guide Errata that is not yet included:
The feat list on p. 154 writes for the feat Perfect Strike:
"Roll twice for unarmed strikes and take the better roll"
The feat description on p. 166 however limits perfect strike to non-unarmed strikes: "You must use one of the following weapons to make the attack: kama, nunchaku, quarterstaff, sai, and siangham."
Since both cannot be correct at once, one of them should be taken up into the errata, to avoid confusion.