Yes, it's temporary. I've talked to the folks at ALPA, and it's a problem that cropped up when they added more servers to the "front-end web farm." They're working on it.
As a temporary fix, substitute "www" for "crewroom" in the url, in other words, use
http://www.alpa.org/fdx/jumpseat
You still may encounter the Password Dialogue, depending on which server you happen to get. If so, back out and try again.
Hope that helps.
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