My b2evolution Version: Not Entered

I know I'm being dense and this must be something simple but I've made several changes lately and I've mucked up something somewhere.

http://www.absolutelytrue.com is my blog, it loads but in IE it says "Done but with errors on the page" and it's a syntax error. I can't figure out what to change though. Can anyone help?

I'm almost sure it's the addthis button that I've added to the posts but not totally sure since I just made some other changes too.

Any help is appreciated. Thanks!