reloading mspx with POST requests works with elinks and dillo

I wondered one more time how to deal with pages like
<http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds.mspx>

I always got a "WWWOFFLE Request Recorded" if i try to load it offline.
(Although i have 'confirm requests' that's also weird)

The page sends POST requests like 
<http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds.mspx?!POST:8hDgjN9Zqj foJpj1NlYdw.43f42566>

It is linked in the sourcecode like 
src="/RESOURCES/mnp_utility.mspx/mainframe?url=aUbpmsLIilBHKmX8QoclqYxelEQ4x3Rrgg8J%2bGqiaIND85sv%2f9lEg64G87pRBt6HlZ%2bmthE03VFH0ommnqXJvU2JnAW7WsFUz2JWuV4l5f0%3d&amp;r="

I just can't lookup the mainframe content, not even via cache index...
This occurs with galeon and firefox.
However, it works with elinks and dillo!


Greets,

Micha


ps. Not all mspx pages work like that, for example i can reload the old page
<http://www.microsoft.com/windows/longhorn/default.mspx>
(What is Windows "Longhorn"?)
which doesn't exist anymore on their servers, it redirects to 
<http://www.microsoft.com/windowsvista/default.aspx>
which i can reload too.