Great news folks! I was playing around with the settings on my BV7-40 (Mark 3) earlier this evening and discovered a new way to 'partially solve' the problem of solid blue lines appearing on some Sky channels.
You need to have your TV upgraded to the latest software version, at least up to the first update that incorporated the new black menu system and DVD Player logo when loading/unloading DVDs. This update adds a further option to the PICTURE submenu called SIZE. Set it to the highest setting (furthest right) and you will no longer have any blue line visibility. The size option slightly increases the picture size a little each time until eventually on the highest setting the lines are no longer displayed on any channel. Have a play and see how you get on. The best thing about this is that you don't have to compromise with the Sky settings, you can still have 1080p at 16:9. OK, you are in effect resizing the picture and not solving the blue line issue as such, they are still their but just not displayed. Either way its a massive improvement I think.
I am unsure whether this was a deliberate fix by B&O HQ to help with this issue. If it was, they certainly haven't told the dealers or any of their staff about it as only yesterday I was told quite categorically by my dealer that this is a Sky issue and that I'd have to live with it. Clearly, I do not have to live with it!
Simon.