I just tested it out myself, and I gotta say, it actually looks great, the only thing that's out of place is a couple of links in the navbar.
Are you using HD or SD TV? SD's display things weird on a lot of sites and have a lot of other problems with the browser.
It's nothing we can really fix, perhaps other skins (if/when we get them) may work better and be more ps3-friendly, but until then I could only suggest that you try the mobile theme, or mess with the settings in the broswer.
Tools > Resolution
and
Tools > Display Area