Error code on my hCG Diet website - help?

Webpage error details

Hey guys,
I'm running a wordpress based site that is also using buddypress and a bunch of plugins for SEO, shopping cart, etc. When opening the site in internet explorer, I get the little yellow flag at the bottom left hand side of the screen saying:

Any ideas on how to figure out what needs fixed?

 

Hey guys, any idea why I get this validation error or how to fix it?

 

no yellow flag on mine

 

It looks like there's a missing bracket "]".
Have you been playing with the code lately?

Byezz

 

I have added some different widgets, etc. but no manual code changes. How would I find where to add the ]?

 

I can't see any yellow flag on your website. Its looking fine for me. Maybe your have find a way to fix the same.

 

Apparently it's in the index page on these directions:
Line: 383
Char: 317

Hope this helps!