"[no subject] Unknown" messages in archives

Some of the list archives show several "[no subject] Unknown"
messages near the top of the page.  For example:

http://archives.postgresql.org/pgsql-hackers/2006-02/index.php

The messages themselves appear to be fragments of other messages.
For example,

http://archives.postgresql.org/pgsql-hackers/2006-02/msg00036.php

is the end of

http://archives.postgresql.org/pgsql-hackers/2006-02/msg00035.php

as shown in the complete message at Google Groups:

http://groups.google.com/group/pgsql.hackers/msg/cf87acb33580e936

Is it a coincidence that the above message has a paragraph that
beings with "From " and that the message is split at that paragraph,
and that said paragraph is absent in the two message fragments?
Methinks that paragraph is being interpreted as the start of a new
message, which would explain why the "[no subject] Unknown" messages
have no subject or date -- the paragraph beginning with "From " is
treated as the headers with the following paragraphs as the body.

--
Michael Fuhr