First off, It was not like the gators were on 4th down and it was a "must make" play. They still had I think 2 downs to go and they were not far from a first down anyway. The Razorback defense while in a tougher position still had a chance to stop the gators from scoreing. (which they did stop the touch down.)
Second, if you recall not to much earlier Jeff Demps was breaking away from the pack with only one person in his way, a defender jumped in front of him and tripped him (which is a penalty) causing a fumble. So this blown call very well could of cost a gator TD as there was nothing but open field in front of Demps and no one is going to catch him when he gets in the open field like that.
So again not to take anything away from the razorbacks, but stop the complaining. Bad calls were made on both sides of the ball and while I do feel sorry for Arizona on the personal foul call, I wonder if they feel sorry on the bad no-trip call.