Upgraded WP now category pages don't work

My automatic category pages are busting out – no resizing of pics and the sidebar widget is at the bottom of the page instead of the side.
This all happened after I installed the latest version of Word press.
I can’t work out how to fix it. Any ideas.
Here’s an example of the page
http://www.ljintroductions.co.uk/audio/

My theme is Magazine Premium

Any help gratefully received.
LJ