Better help the Dev Team instead of posting the same question over and over again.Hi Bruno,
Can you send us the IP address of the CDN server you are getting the default.include-footer.87dfde.js file from. You can see this on the Net tab in Firefox or, even better, you could just send us a screenshot of the Net tab in firebug where a request for default.include-footer.87dfde.js file is visible when this error happens.
Thanks for your help.