I'd be interested to know also as I get the same message however have been ignoring it whilst my application worked.....
You are correct, it is from the dojo.js
I am currently getting an error on mobile devices when using the expand/collapse all control
An error occurred while updating some of the page. Unable to load http:\\[domainURL]/index.xsp?$$ajaxid=view%3A_id1%3A_id2%3A_id8%3A_id9%3Aview
which is also from dojo.js.... would it be related possibly?