Hi did you get the problem resolved, I have noticed the same problem. The picture quality has definitely gone down on sky sports HD?.
I've not noticed any degradation in PQ on any Sky or BT Sports channels recently.
Are there any specific channels you've noticed this on?
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Same here, has definitely degraded recently. BT via the V6 is fine, as is football on Prime, it's definitely an issue with the Sky Sports HD channels on the V6.