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I just install today's updates in Ubuntu 12.04, and after a restart my Gnome Shell desktop looks like Gnome 2 with two panels. See photo:

None of my Gnome Shell extensions work now either. The Ubuntu Software Centre says Gnome Shell is still installed. Did the update brake Gnome Shell??

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up vote 2 down vote accepted

Fixed it. I had to uninstall the proprietary ATI graphics card drives:

cd /usr/share/ati
sudo sh ./

Then reboot.

I then reinstalled the ATI driver and everything is working again.

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