Flex FileReference - FireFox Multipart-Session bug [closed]

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In Mozilla FireFox, every time you send a request to the server that has a multipartform-data (using FileReference when uploading a file) the SESSIONID value is not send in the HTTP header. That means that if the application/page/site you are working on is authenticated i开发者_Python百科ts not going to work. This only happens in FireFox, IE 6, 7, 8 work fine.

I know must of you are already aware of this FireFox bug. Have anyone found a work-around that doesn't relay on a back-end fix?

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We are sending our session id in the post.