[ubuntu] Gnome Shell Extensions Error

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http://ubuntuforums.org – I recently upgraded 4 machines to Ubuntu 12.10. 1 machine is 32 bit, the 3 others are 64 bit. On two of the 64 bit machines I am getting this error when visiting the Gnome Extensions.org website which worked fine before the upgrade: "You do not appear to have an up to date version of GNOME 3. You won't be able to install extensions from here. See the about page for more information." I am using Firefox on all machines. I have deleted all extensions from both .local/share/gnome-shell/extensions and /usr/local/gnome-shell/extensions and this did not fix the issue. Does anyone (Hardware)