chickens and wheat not breading

Hello Mojang,
A weird bug has been happening since I updated to 1.4.2 where I have a 50% chance of breading mobs other than chickens and 0% chance with chickens. I have a screen recording of the chickens and they apparently are not* attracted to the wheat ether. If you can't see the screen shot let me know and i'll upload another.
Thanks for your time

Link to screenshot: https://www.dropbox.com/s/ya5tpvuuad7ii85/bug%20glich.webm