I can't believe this is a problem with ITV? I work in transmission and I understand how these sorts of issues are recorgnised, reported and fixed. The X-factor was unwatchable on Sat night and if I was doing my job for them and it went un fixed for 90 minutes like it was then I would get a big slap on the hand and possibly even fired.
I also might add that it was fine on ITV1 SD
and the Jonathan ross show after it was the same, out of sync on the HD channel and in Sync on the SD channel