It's pure speculation, but it is strange that the teleprompter worked until Palin. I think it's possible for the 'rats to have learned what teleprompter would be used, and either bugged it or tested the model until they found a frequency that could interfere with it's normal operation. What a perfect set up to first claim his VP isn't ready then try to throw her off with Code Pink operatives trying to storm her stage and someone messing with the tele-prompter. If I'm right, McCain needs to be prepared for a repeat tonight. And they ought to consider changing tele-prompter...