svnserve: DIGEST-MD5 common mech free

I repeatedly get this message in my server log.

Googling has shown that I'm not alone, although not everyone reports the
message coming from svn. Other than that, it has shed little light on
what the problem might be apart from it being somehow related to SASL.
My SVN server is not using SASL at all (as far as I know) as the
relevant section in svnserve.conf is commented out.

I've searched the web and any likely mailing lists, FAQs, documents but
am not closer to eliminating the message. Can anyone put me out of my
misery?

Thanks.
Received on 2013-04-29 15:56:49 CEST