python-django-horizon-2012.2.3-1.el6 has been submitted as an update for Fedora EPEL 6.
https://admin.fedoraproject.org/updates/python-django-horizon-2012.2.3-1.el6

Package python-django-horizon-2012.2.3-1.el6:
* should fix your issue,
* was pushed to the Fedora EPEL 6 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=epel-testing python-django-horizon-2012.2.3-1.el6'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-EPEL-2013-0559/python-django-horizon-2012.2.3-1.el6
then log in and leave karma (feedback).

Hi,

Thanks for the package which effectively is now available on EPEL.

Meanwhile that didn't fix it but that's out of scope of this one.

Regards

OK, what is the issue, you're seeing?

Especially, this update should make dashboard working without a configured volume service.

Hi Matthias,

I know but when the volume link is selected it drop the internal error message. 
I restarted apache after updating.

With debug mode the first part of the message is below.

Cheers
Gilles

------------------------------------------------------------------------------
TypeError at /syspanel/volumes/

'NoneType' object is not iterable

Request Method: 	GET
Request URL: 	http://localhost/dashboard/syspanel/volumes/
Django Version: 	1.4.5
Exception Type: 	TypeError
Exception Value: 	

'NoneType' object is not iterable

Exception Location: 	/usr/lib/python2.6/site-packages/horizon/dashboards/nova/volumes/views.py in _set_id_if_nameless, line 62
Python Executable: 	/usr/bin/python
Python Version: 	2.6.6
Python Path: 	

['/usr/share/openstack-dashboard/openstack_dashboard/wsgi/../..',
 '/usr/lib64/python26.zip',
 '/usr/lib64/python2.6',
 '/usr/lib64/python2.6/plat-linux2',
 '/usr/lib64/python2.6/lib-tk',
 '/usr/lib64/python2.6/lib-old',
 '/usr/lib64/python2.6/lib-dynload',
 '/usr/lib64/python2.6/site-packages',
 '/usr/lib64/python2.6/site-packages/gtk-2.0',
 '/usr/lib/python2.6/site-packages',
 '/usr/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg-info',
 '/usr/share/openstack-dashboard/openstack_dashboard']

Server time: 	Tue, 12 Mar 2013 05:11:28 -0500

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python-django-horizon-2012.2.3-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.