Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site crystal.ARPA
Path: utzoo!linus!wivax!decvax!harpo!seismo!uwvax!solomon
From: solomon@uwvax.UUCP
Newsgroups: net.news.b
Subject: Multiple copies of news items
Message-ID: <225@crystal.ARPA>
Date: Sun, 19-Jun-83 10:17:08 EDT
Article-I.D.: crystal.225
Posted: Sun Jun 19 10:17:08 1983
Date-Received: Mon, 20-Jun-83 01:13:44 EDT
Organization: U of Wisconsin CS Dept
Lines: 38

One of the sites philabs, linus, genrad, decvax, or harpo is fiddling
with message ID's, causing duplicate items.  I got two versions
of an item in net.auto.   They took the same route here except that
one of them went directly from harpo to seismo while the other took
a detour through the above-named sites.  The second copy had several
header lines deleted (References, Organization, and Relay-Version)
and had a ".UUCP" ADDED to the Message-ID.  The change to Message-ID
meant that it was not detected as duplicate.  I suspect that some
site is running an old version of news that strips these fields, and
another site is regenerating Message-ID from Article-I.D. using
a different algorithm from the one used at the source of the item (uw-june).
Any comments?

Diffs between the two copies follow:

3,4c3
< Posting-Version: version B 2.10 5/3/83; site uw-june
< Path: crystal!uwvax!seismo!harpo!floyd!vax135!cornell!uw-beaver!uw-june!emma
---
> Path: crystal!uwvax!seismo!philabs!linus!genrad!decvax!harpo!floyd!vax135!cornell!uw-beaver!uw-june!emma
8c7
< Message-ID: <482@uw-june>
---
> Message-ID: <482@uw-june.UUCP>
12,15c11,12
< Date-Received: Fri, 17-Jun-83 03:23:31 CDT
< References: hou5e.560 <561@hou5e.UUCP>
< Organization: U. Washington, Computer Sci
< Lines: 9
---
> Date-Received: Sat, 18-Jun-83 01:28:37 CDT
> Lines: 10
-- 
	Marvin Solomon
	Computer Sciences Department
	University of Wisconsin, Madison WI
	solomon@uwisc
	...!seismo!uwvax!solomon