I agree - it's got absolutely nothing to do with the TVs at all. And mine is connected via a home theatre amp anyway.
Touch wood, my new box has behaved itself so far, including the Sunday afternoon game last weekend.
It is definitely newer than my previous one as (a) it has the newer BT logo on the front (and on the remote), and (b) it doesn't have a SCART socket which the older model had.
Panasonic Viera TX-50CX700B
This only started recently - I've had NowTV for a while (for the sport) and the problem occurs when the broadcast switches from adverts back to live TV when the broadcast is from a live event. It's all but as though Sky are sending some signal down that is being interpreted by the youview box. But as this hasn't always happened, is it likely that the problem is in a firmware upgrade on the Youview box OR Sky changing what it sends down the line?
PS to all - I have found that I can go to the TV settings on the youview box (set normally to 1080p) and change that setting to 1080i - it then appears to send something to the TV and ask if you want to keep the setting - say no to that and stay on 1080p and the picture reverts to normal without a reboot.
Thank you all for your comments.
When the colour issue occurs, is this on HD and if so, if you switch to the SD version of the channel do you still see pinks/greens?
To answer your first question, yes.
As for your second question, I can't recall whether I tried that or not, although I did try moving to other channels. I just don't recall whether I got as far as the SD versions of the channels (using channel up/down on my remote, as I hide all the SD channels in the EPG).
Essentially, the issue remained for all channels and recordings (although they would have been in HD as well), but NOT apps - that was how I managed to complete watching the match I was following when it started to happen every 10 mins or so via the EPG.
Should the problem ever appear on my replacement box (fingers crossed it hasn't so far, but does seem to be happening to a few users with newer boxes), then I'll sure give that a try (along with @stevetucknott's suggestion).
When it happened last night with the Wolves game, I switched to BBC 1 SD and the picture remained in purple/green/monochrome. I haven't tried an SD Sky Sport channel to see if the colour switch happens if on an SD channel initially.
As an side,the clicking and disturbance on the TV before the picture switches to the odd colour scheme seems to be getting worse.