I think some past Racket email list discussions currently are no longer findable via Google. Anyone know anything more about this?

Details...

Yesterday, I was trying to use Google to find particular messages from a couple years ago, and was getting 0 hits. I was only able to find the messages archives on pages that *are* being served by "lists.racket-lang.org" *after* I found other references to the dates of the messages, and navigated through "lists.racket-lang.org" manually. I confirmed that the Google keyword searches should've matched the message pages, and that the message pages were available from Google text cache.

Just now, I quickly confirmed that the current Google coverage of email list archives on "lists.racket-lang.org" is spotty (see below), from current date back through January 2014. I did not check other dates. I don't know whether that has anything to do with the slightly odd "robots.txt" (see below), which the validator I just tried claimed would permit all crawling, but I'm not sure.

Google Text Cache *Does* Exist
==============================
http://lists.racket-lang.org/users/archive/
http://lists.racket-lang.org/users/archive/2015-May/thread.html
http://lists.racket-lang.org/users/archive/2015-March/thread.html
http://lists.racket-lang.org/users/archive/2015-February/thread.html
http://lists.racket-lang.org/users/archive/2014-December/thread.html
http://lists.racket-lang.org/users/archive/2014-November/thread.html
http://lists.racket-lang.org/users/archive/2014-July/thread.html
http://lists.racket-lang.org/users/archive/2014-June/thread.html
http://lists.racket-lang.org/users/archive/2014-April/thread.html
http://lists.racket-lang.org/users/archive/2014-March/thread.html
http://lists.racket-lang.org/users/archive/2014-January/thread.html

Google Text Cache Does *Not* Exist
==================================
http://lists.racket-lang.org/users/archive/2015-January/thread.html
http://lists.racket-lang.org/users/archive/2014-October/thread.html
http://lists.racket-lang.org/users/archive/2014-September/thread.html
http://lists.racket-lang.org/users/archive/2014-August/thread.html
http://lists.racket-lang.org/users/archive/2014-May/thread.html
http://lists.racket-lang.org/users/archive/2014-February/thread.html

http://lists.racket-lang.org/robots.txt
=======================================
User-agent: *
Disallow:

Neil V.

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