Upgraded to 3.2; why did I mess with it (*#&*(&

Those nagging notices at the top of the screen bug me. So I upgraded to 3.2. Why does the admin page not fill the screen? I feel as though I am tilting my head looking at the screen.

I've looked in chrome and ff and there is a big empty gap on the left of the page.

I've played around in firebug a bit but can't find the css I need to tweak to get the page either centered or taking up the whole screen.

Any advice? And why is there that big gap anyway?

Thanks
Lori