Problems since I upgraded

I recently automatically upgraded to version 3 and there are a few problems…it could be related, or not..

1.My dashboard never fully loads…only the headers (if anything) are there, and on the side, the dropdown menus don’t work.

2. When I try to quick edit a post, nothing happens….

3. More often than not, pages won’t load. The page stops loading and it’s just a blank screen. Occasionally I get a 500 Error, but then I refresh and it’s gone.

4. I can’t edit my posts. I click update, and it goes to a blank screen, not saving the changes.

I use GoDaddy to host it… does anyone know if these are problems with them or with WordPress???