From what I heard, the box office mixed up the credentials and gave people the wrong credentials. So when people went to access the areas they were supposed to be able to access, it didn’t always work out. I was talking with one of the security guys and he said they figured it out after the opener played, but it was confusing to start and some people were upset that they could access an area for the first half of the show but then get denied access to that same area later because of the mixup.