Curious, I find the Sky SD picture much more watchable on my KRP-500a compared to its internal tuner, the freeview picture seems to have a lot more mpeg blocking, compared to the Sky output.
I have the Sky box set to auto for the picture output, allowing the TV to upscale the SD pictures, this is a vast improvement over setting the output of the Sky box to 1080i, the Sky upscaler is not very good, perhaps the people in this thread should try that?