AllegroServe and multipart form data

Section "Retrieving multipart/form-data information" of the
AllegroServe manual says: "It's important to retrieve all of the data
sent with the form, even if that data is just ignored.  This is
because there may be another http request following this one and it's
important to advance to the beginning of that request so that it is
properly recognized." 

Does it mean that if a client is uploading a file the server should
read it all even if she do not intend to use it? This would be
strange. Or it means that we can make do only by retrieving all the
multipart headers?

Thank you.

Regards,
-- 
Kamen TOMOV