Pages won’t save any change!! please help!!!

I’ve built a site for a client using the last version of WordPress. Every other page and/or post works perfectly execept for one page: Projects. Ironically, this is the one page will have the most changes in the future.

I can’t save anything on this page. Even when I collapse those options on the side I get the same pop-up message: Are you sure you want to navigate away from this page? Any changes will not be saved. It only happens on this page too. What have I done wrong??

Please help!! I’m desparate! The client will want full access to the site by this coming Friday!! (Nov 2nd)

http://www.seapei.ca