update-manager Couldn't connect to accessibility bus

** (update-manager:7750): WARNING **: Couldn't connect to accessibility bus: Failed to connect to socket /tmp/dbus-GxEtj3txBA: Connection refused

Always happens when using update-manager.. System originally installed from Trusty media, upgraded to Utopic. Happened in both.
Amongst kernels used are: 3.15, 3.16.0.20, 3.17. Same error. Current kernel:

Linux ps01lnx 3.17.0-031700-generic #201410060605 SMP Mon Oct 6 10:07:09 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
Description: Ubuntu Utopic Unicorn (development branch)
Release: 14.10

dbus:
  Installed: 1.8.8-1ubuntu2
  Candidate: 1.8.8-1ubuntu2
  Version table:
 *** 1.8.8-1ubuntu2 0
        500 http://us.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: dbus 1.8.8-1ubuntu2
Uname: Linux 3.17.0-031700-generic x86_64
ApportVersion: 2.14.7-0ubuntu5
Architecture: amd64
Date: Wed Oct 8 08:28:33 2014
InstallationDate: Installed on 2014-07-01 (98 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
SourcePackage: dbus
UpgradeStatus: No upgrade log present (probably fresh install)
upstart.dbus.log: g_dbus_connection_real_closed: Remote peer vanished with error: Underlying GIOStream returned 0 bytes on an async read (g-io-error-quark, 0). Exiting.