This is interesting though, they moved away from having refs do both.
2007 - No ref did Qtr & Semi
2003 - No Ref did Qtr & semi
1999 - Both Semi final Refs did Qtrs (Non got the final). (Bevan & Flemming)
1995 - 1 Semi final ref did a Qtr as well (Didn't get final). (Bevan)
1991 - 1 Semi final ref did a Qtr as well (Didn't get final). (Flemming)
1987 - 1 Semi final ref did a Qtr as well (Didn't get final). (Anderson)
Maybe this is what Paddy meant by possibly doing it different.
With Joubert Refereeing the Aus v NZ game, if Wales Beat France the Joubert will have refereed both finals teams, so they will be aware of his ways and that means the game will be less likely to be about the referee, and more likely to be about the Rugby.
Maybe Craig Joubert will be the first Referee to Referee in every knockout stage at a RWC! I certainly Hope so, he has deserved it. Although if France do lose to Wales, I'd be happier to see Poite do it as he's our No.1 rated referee, and his scrum & TRM management is rated as the best. And if he can referee like he did in the ERC Final it would be awesome.