Games Lists glitch?

I am also having problems with my Games List catagories (my collection, wishlist, or now playing). I have tried to add games but nothing ever happens. I click on the Add button and all that happens is I get the little yellow triangle with the exclamation mark in it in the lower left of your page. There seems to be some error [ Error: _ _ _ _ is undefined ] continually happening when I click the 'add' button. The page loads loads without any problem prior to clicking the add button.

I have tried deleting all of my GameSpot cookies and cleaning out my Temporary Internet Files which has worked on other sites when the same problem occurred.

Any Ideas ?????