External dependencies on that page? Anything being pulled from a domain that might have made the list? It might not be specific to your page, it might be on a JS library you are including.
The irony is we use GWT for our UI which is used by many google products. when we search in web the closest issue we found if from a joomla forum: http://forum.joomla.org/viewtopic.php?f=621&t=802284