Menus behaving very oddly after ES Update

Hi Si Team

http://finalbug.net/
and
http://finalbug.net/blog

Somehow seem to go here (kind of) :
http://finalbug.net/events

The only thing I changed recently was my ES version went to ES1.3.7 from ES1.3.6

Home page should go here: EasyBlog » Single Blog Entry Layout
Blog should go here: EasyBlog » Frontpage Blog Layout

Any ideas what is going on!?!

thanks

Paul