Comment 26 for bug 662204

About the 401 problem... From this symfony bug http://trac.symfony-project.org/ticket/4474 and reading the http standard definition of the 401 status http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html

I think we can safely remove the lines returning the 401 status as anyway it is a bad use of this status. That will solve your problem as well as some browser-specific problems we may get in the future.