In the past week I have noticed this weird issue whereby when watching ITV1HD, I am getting a stuttering frame rate every few minutes.
It's hard to describe but essentially, it's like the frame freezes for a second but then continues without the missing frame causing a jump in the picture (so as an example, if the screen is showing a person's finger pointing at a blackboard with numbers from 1 to 10 going downwards in a list, he will point to number 1, then 2, then 3, then there will be a frame freeze, and then it will unfreeze and the picture will jump to the person pointing to number 5, then 6 and so on).
I've tried to see the same behaviour on other HD channels but can't seem to do so. I have mostly noticed this whilst watching I'm A Celebrity Get Me Out of Here on ITV1HD so can't be sure if its to do with ITV1HD in general, my V6 box or the Live transmission from Australia to UK during the program causing the glitch (the program is always shown Live)..?!!