Updated to 3.3, now wp-admin looks like crap.

I just updated my wordpress from 3.2.1 to 3.3, now my wp-admin looks like crap, 90-retro or something.
I’m running a homebuilt theme from the basics of twenty eleven.
It was looking as it should before I updated wordpress from 3.2.1 to 3.3.
img: https://ringstad.nu/wpadmin.jpg