Periodic (daily) Time Machine failures

I'm not sure if it does bring the newer AFP as I didn't see that mentioned anywhere (so I edited my post above), so it could still be AFP 3.1, but working better actually.

Here's some info I found on the netatalk version using RAIDiator 4.1.6

MDGM-NAS:~# afpd -V
afpd 2.0.3+cjk3 - Apple Filing Protocol (AFP) daemon of Netatalk

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
Foundation; either version 2 of the License, or (at your option) any later
version. Please see the file COPYING for further information and details.

afpd has been compiled with support for these features:

        AFP3.1 support: Yes
      Transport layers: TCP/IP DDP
         CNID backends: cdb dbd
           SLP support: No
  TCP wrappers support: No
         Quota support: Yes
   Admin group support: Yes
    Valid shell checks: Yes
      cracklib support: Yes
        Dropbox kludge: No
  Force volume uid/gid: Yes

             afpd.conf: /etc/netatalk/afpd.conf
   AppleVolumes.system: /etc/netatalk/AppleVolumes.system
  AppleVolumes.default: /etc/netatalk/AppleVolumes.default
       UAM search path: /usr/lib/netatalk/

Edit: it is still 3.1. I was wrong before. The next version of netatalk (currently in public beta) should bring 3.2. See http://netatalk.sourceforge.net/2.1/ReleaseNotes.html.

So 2.0.5 should be some improvement and later versions of netatalk will be even better. It's just a matter of waiting for the newer version to become stable and NetGear to test the newer version of netatalk to make sure it works properly with the ReadyNas.