New error: 'Undefined' is null or not an object

Just started getting this error in my D7.0.4 site:

Message: 'undefined' is null or not an object
Line: 1263
Char: 13
Code: 0
URI: http://www.etalentshowcase.com/dolphin704/index.php

It only occurs when logged in, otherwise it looks fine.

Any ideas? Thanks.

Did you make some changes in  member menu?

Yes I did. I drag some unused items off of the user menu. Are some of the items mandatory?