Further to ikegami's response, I'd like to point out that one of the best discussions of this sad state of affairs that originally came about because essentially all user agents ignored the HTTP standard is part of the Lynx FAQ. Essentially you will not be able to rely on consistent browser behaviour or standard adherence because of this.

In reply to Re: Redirecting with a POST by Celada
in thread Redirecting with a POST by cosmicperl

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