Updated to 9.10 and software center won't start.

I'd try a reinstallation via terminal. All other package management apps (GUI) should be closed.
sudo apt-get purge software-center
sudo apt-get install software-center

Clean up and update.
sudo apt-get autoremove && sudo apt-get clean && sudo apt-get autoclean
sudo apt-get update && sudo apt-get upgrade

Thanks Sam, this did not solve the problem however i have realized that other programs are not loading either. Mostly sound and video programs, movie player, cd extractor, brasero, rythmbox They all start to load and then just stop. I am not sure if this is all related or not ... any suggestions?

Yep, according to
> Could not initialize GStreamer
uninstall/reinstall successive related gstreamer packages (depends whatever you've installed)
e.g.:
gstreamer0.10-plugins-bad
gstreamer0.10-plugins-ugly
gstreamer0.10-ffmpeg
gstreamer0.10-plugins-bad-multiverse
gstreamer0.10-plugins-ugly-multiverse
gstreamer0.10-alsa

Seems to be a common issue, some other ideas here:
http://ubuntuforums.org/showthread.php?s=5036c3ad6feb8b4f53852a8abc99c523&p=8377817

If nothing helps report a bug:
https://help.ubuntu.com/community/ReportingBugs
or search
https://launchpad.net/ubuntu/+source/software-center/+bugs

Sam wrote:
> Your question #92521 on software-center in ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/software-center/+question/92521
>
> Status: Open => Answered
>
> Sam proposed the following answer:
> Yep, according to
>
>> Could not initialize GStreamer
>>
> uninstall/reinstall successive related gstreamer packages (depends whatever you've installed)
> e.g.:
> gstreamer0.10-plugins-bad
> gstreamer0.10-plugins-ugly
> gstreamer0.10-ffmpeg
> gstreamer0.10-plugins-bad-multiverse
> gstreamer0.10-plugins-ugly-multiverse
> gstreamer0.10-alsa
>
> Seems to be a common issue, some other ideas here:
> http://ubuntuforums.org/showthread.php?s=5036c3ad6feb8b4f53852a8abc99c523&p=8377817
>
> If nothing helps report a bug:
> https://help.ubuntu.com/community/ReportingBugs
> or search
> https://launchpad.net/ubuntu/+source/software-center/+bugs
>
>
Thanks Sam, I appreciate the help. One of the links led me to:
sudo apt-get remove frei0r-plug-ins
this worked for all.
will post when launchpad is back up

wperre wrote:
no that seems to have fixed all the problems
> Your question #92521 on software-center in ubuntu changed:
> https://answers.launchpad.net/ubuntu/+source/software-center/+question/92521
>
> Status: Answered => Open
>
> You are still having a problem:
> Sam wrote:
>
>> Your question #92521 on software-center in ubuntu changed:
>> https://answers.launchpad.net/ubuntu/+source/software-center/+question/92521
>>
>> Status: Open => Answered
>>
>> Sam proposed the following answer:
>> Yep, according to
>>
>>
>>> Could not initialize GStreamer
>>>
>>>
>> uninstall/reinstall successive related gstreamer packages (depends whatever you've installed)
>> e.g.:
>> gstreamer0.10-plugins-bad
>> gstreamer0.10-plugins-ugly
>> gstreamer0.10-ffmpeg
>> gstreamer0.10-plugins-bad-multiverse
>> gstreamer0.10-plugins-ugly-multiverse
>> gstreamer0.10-alsa
>>
>> Seems to be a common issue, some other ideas here:
>> http://ubuntuforums.org/showthread.php?s=5036c3ad6feb8b4f53852a8abc99c523&p=8377817
>>
>> If nothing helps report a bug:
>> https://help.ubuntu.com/community/ReportingBugs
>> or search
>> https://launchpad.net/ubuntu/+source/software-center/+bugs
>>
>>
>>
> Thanks Sam, I appreciate the help. One of the links led me to:
> sudo apt-get remove frei0r-plug-ins
> this worked for all.
> will post when launchpad is back up
>
>

> no that seems to have fixed all the problems

wperre,
can you please clarify if the problem persists, thanks.

At this point all of the problems are fixed. Removing the video plug-in, Frei0r, solved the problems.