This was the first time that the umps blew a call from replay. I don't know what they were looking at, but everyone else saw that replay and instantly knew it was a HR.
BTW, I was listening to MLB Radio on XM this morning and they were interviewing Jim McKean, the former head supervisor of the umps. He stated that Hernandez is the most accurate umpire when it comes to calling balls and strikes and has the highest percentage of correct calls to missed calls. He went on to say that he is the weakest ump when it comes to demeanor and management. He said his call accuracy is why he is always picked to do playoff games, but is poor management is why he will never make crew chief.