upgrade to 2.03 with sidebar problem

I recently did an upgrade from 1.5 something to 2.03 using the fantastico upgrade. The site was more or less virgin nothing done to it in months using the default theme. Since upgrading, all the sidebar stuff is pushed to the bottom increasing the length of what is a page with not much on it – except a lot of white space in the sidebar.

Have a look at the site here:

https://www.fleetscale.com/news/

Any ideas please?