Well, maybe it's a known issue, but I'll try my best. I ran into trouble when I wanted to completely avoid using my cgis with the parameters in the Location bar (i.e. simulating a GET method). I wanted the users to always go through the page. Now, that's one way to do it: 
if ($ENV{'QUERY_STRING'}) {
  print "Location: http://www.something.net/badboy.html\n\n";
  # Do some logging if you wish here, although I don't know if it's po
+ssible
  exit;
}

[download]
I would be interesting to find out if there are other ways to do it, or if this method causes any side-effects.

In reply to Avoiding GET in CGIs by Michalis

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