[kaphc]

Yes, the housemates actually said that about the crowd noises as well. They reckoned that as they weren't played, Big Brother actually WANTED them to hear that!

Also what about that weird ambient music that they used to play into the house - where's that gone?

Like everyone else, I think it's bang out of order that the housemates heard what was going on. It seems odd that the producers let them hear that when they have designed the front doors to try and block out as much crowd sound as possible.