Here's the abjuration school wizard speical ability "Protective ward" (emphasis mine):
Protective Ward (Su): As a standard action, you can create a 10-foot-radius field of protective magic centered on you that lasts for a number of rounds equal to your Intelligence modifier. All allies in this area (including you) receive a +1 deflection bonus to their AC for 1 round. This bonus increases by +1 for every five wizard levels you possess. You can use this ability a number of times per day equal to 3 + your Intelligence modifier.
I'm not sure how to take this. Why does the bonus last "for 1 round", when the field lasts longer? How does this work?
It looks like a typo. I'd guess that it should last Int mod rounds, as otherwise it seems rather weak. That is purely my personal opinion though.