Well then why aren't ITV using the same settings as BBC HD and the rest of the HD broadcasters; you know, the ones that are also within the DVB-S2 specs that don't seem to be causing any TV manufacturer any issues then?ITV are NOT doing anything non standard. Their broadcasts are within the DVB-S2 specifications and the Panasonic TV specifications state that they can handle it. But in practice they can't due to poor design which Japanese pride prevents them from admitting. Apart from a few Sonys no other TVs or set top boxes have any problems with ITV HD. Do you really think a major broadcaster would broadcast non standard signals?
That is their choice. There are many different settings within the DVB-S2 specs, and different broadcasters choose according to satellite coverage required, power etc. You only have to go through the satellite listings to see all the different settings used.
It really is up to Panasonic to sort out their design to work to the specs, not just part of them.