2009-07-21 20:06:22 UTC
In case anyone else is struggling with this...
After doing some testing with the GPO settings for firefox I was unable to then deactivate the policies on my machine even after removing my computer from the policy.
I had to remove all of the 'lock' settings that were added to the bottom of the 'prefcalls.js' file that's located in %program files%\Mozilla Firefox\defaults\autoconfig
There may be a more elegant way to fix this but the above worked for me.
Enjoy.