Yes I have noticed that our TV picture "jumps and freezes" every so often, but what is worse is that load "cracking" noise that comes with it, I keep thinking my TV is going to explode?
We have the TY Drive box from Telewest, in fact we use all of their services
I did phone them up, but never really got a satisfactory answer, kept being transferred to different departments
(I did try changing the batteries in the remote control,(before it was suggested by staff at the call centre) but no difference)