I noticed this problem on ITV3 this morning too. Very poor picture, pixellation occurring very regularly.
I noticed a little pixellation on BBC One HD on Friday night too. Plus the VOD I have watched so far has been appalling quality (mostly music videos).
Only just switched from SkyHD, so not the most impressive of starts. Overall, I have to say most of the channels appear poorer quality than they did on SkyHD.
