dual display layout not remembered between reboots

I have an external screen (well recognised upon connection via HDMI) that I have on the left of my primary laptop display.

I can set this in the display configuration in switchboard, but upon reboot, I find the display to be configured on the right side again, which appears to be the default, and have to reconfigure.

Expected behaviour:

Define display layout once and remember *forever*. :-)

ProblemType: Bug
DistroRelease: elementary OS 0.3
Package: switchboard 2.0.0~r530+pkg41~ubuntu0.3.1 [origin: LP-PPA-elementary-os-daily]
ProcVersionSignature: Ubuntu 3.13.0-44.73-generic 3.13.11-ckt12
Uname: Linux 3.13.0-44-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
CrashDB: switchboard
CurrentDesktop: Pantheon
Date: Sat Dec 20 10:41:35 2014
GSettings:
 org.pantheon.switchboard.saved-state position ['2205', '362']
 org.pantheon.switchboard.saved-state window-height 766
 org.pantheon.switchboard.saved-state window-state 'Normal'
 org.pantheon.switchboard.saved-state window-width 1038
GsettingsChanges:

InstallationDate: Installed on 2014-08-19 (122 days ago)
InstallationMedia: elementary OS 0.3 "Freya" - Daily amd64 (20140810)
SourcePackage: switchboard
UpgradeStatus: No upgrade log present (probably fresh install)