After upgraded to 2.2, GPS/NAV is not working. All settings for GPS are disabled.
Do you, per chance have a GPS on/off widget on one of your screens? If set to off, your GPS settings will be ghosted out in Menu. After 2.2 upgrade, my GPS widget went to off and the GPS settings in Location were ghosted out. Turned GPS widget to on, settings no longer ghosted out, selected enable GPS and assisted GPS and it works fine. No problem. Also, of course, you must be outside with a view of the sky for GPS to work.