sd,
The basic idea was that the mere presence of non-mormons
inside the temple defiled it. Even though it was brand
new, after the open house, it was closed and gutted and
redone. Now, I do not know if that is true.
ampu
That is not true. Anyone is welcome at a temple open house and there is nothing done to the temple between the open house and its dedication.
I’ve never heard of any such incident, either. Frankly, I can’t envision any way it would happen, short of some kind of tragedy such as murder taking place inside. If uninvited people were to barge in, they would be escorted out by the elderly ushers and business would resume as normal.
Without more info, though, I can’t give you any specific answer either.