Address munging in pipermail

This link has appeared in Google:
http://lists.xiph.org/pipermail/flac/2008-February.txt

This file contains e-mail addresses en claire
(in the clear).  Addresses in the headers are
munged, but not in the body.

This is strange because this never used to
happen.  I regularly search Google for my
e-mail address, and such lists have never
shown up before.

Also, in the archive, e-mail addresses in the
body of messages are munged.  See for
example:
http://lists.xiph.org/pipermail/flac/2008-February/001226.html

Does anybody know what has changed?

Many thanks,
Martin
-- 
Martin J Leese
Web: http://members.tripod.com/martin_leese/