Appearance of old facebook comments on MU sites.


The website I run used to have WordPress default comments; after that for several months it had Facebook plugin comment boxes;
now I switched to Facebook Ultimate plugin.

On one site the old facebook comments look normal; whereas on the other they look like WordPress comments.
I set up Facebook ultimate from the main network site. So, I don't think I did anything different that can entail these appearances.

Would you take a look at it?

See as examples: