unity-settings-daemon crashed with SIGSEGV in dconf_engine_call_handle_reply()

Dear Developers,

Normal situation not happening I think this crash, but possible important.
I temporary used Gnome Flashback session with Metacity window manager.
I want adding system wide level with some custom keybindings with normal dconf profile, based from GNOME wiki page.
Source Wiki document is following:
https://wiki.gnome.org/Projects/dconf/SystemAdministrators

My /etc/dconf/profile/user file containing following two lines:
user-db:user
system-db:keybinding

My /etc/dconf/db/keybinding.d/00-keybinding file containing following lines:
[org/gnome/settings-daemon/plugins/media-keys]
custom-keybindings=['/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom0/', '/org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom1/']

[org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom0]
binding='<Super>g'
command='gedit'
name='Launch Gedit'

[org/gnome/settings-daemon/plugins/media-keys/custom-keybindings/custom1]
binding='<Super>r'
command='libreoffice --writer'
name='Launch Libreoffice Writer'

When I ran dconf update command, without any error right created /etc/dconf/keybinding database file.
I experiencing this crash after try logout and login again.

I using standard dconf keys and values, so I don't understand why happened this crash. If not need fixing this issue in unity-settings-daemon package, please tell me what the standard way to add custom keybindings with system wide level (very interesting me this possibility with I readed from the wiki document).

Attila

ProblemType: Crash
DistroRelease: Ubuntu 14.04
Package: unity-settings-daemon 14.04.0+14.04.20140310-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic i686
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
Date: Fri Mar 14 08:24:49 2014
Disassembly: => 0x0: Cannot access memory at address 0x0
ExecutablePath: /usr/lib/unity-settings-daemon/unity-settings-daemon
InstallationDate: Installed on 2013-12-13 (90 days ago)
InstallationMedia: BeLin 3.02 i386
ProcCmdline: /usr/lib/unity-settings-daemon/unity-settings-daemon
ProcEnviron:
 LANGUAGE=hu
 XDG_RUNTIME_DIR=<set>
 LANG=hu_HU.UTF-8
 SHELL=/bin/false
SegvAnalysis:
 Segfault happened at: 0x0: Cannot access memory at address 0x0
 PC (0x00000000) not located in a known VMA region (needed executable region)!
 Stack memory exhausted (SP below stack segment)
SegvReason: executing NULL VMA
Signal: 11
SourcePackage: unity-settings-daemon
StacktraceTop:
 ?? ()
 ?? () from /usr/lib/i386-linux-gnu/gio/modules/libdconfsettings.so
 ?? () from /usr/lib/i386-linux-gnu/gio/modules/libdconfsettings.so
 g_simple_async_result_complete () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
 ?? () from /usr/lib/i386-linux-gnu/libgio-2.0.so.0
Title: unity-settings-daemon crashed with SIGSEGV in g_simple_async_result_complete()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: