That kind of sucks.
If you look at the pdfs for '07, the new Record brakes have all new numbers for the different length nuts EXCEPT for the longest one which stayed the same as '06, BR-RE427. Its possible that there is a new longer 24mm alloy nut with TORX, but Campy missed that in their editing of the spares parts book. With all those numbers and changes there are bound to be mistakes.
There probably is a new part number, but right now only Campy knows what it is.
I know somebody who works directly with Campagnolo Italy (he has my old job). I will send him an e-mail this weekend and try to get an answer about this, for you on Monday or Tuesday.