Has anyone else had picture breakup on BBC HD? In the past few weeks it seems every programme seems to collapse in to blocks and then wipeout for about 1 to 2 minutes as it reconfigures. It always happens in Heros and Waking the Dead. Is a signal problem or is it my box? It seems to happen 20 to 30 minutes into the show....never trhough the classy BBC HD ads.... is it copy protection?