Any idea why I am getting this error and unable to access ARRSE using Firefox 11.0 on Window 7 x64? "Content Encoding Error The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression." This is only happening in Firefox, all other browsers seem to be OK. Problem started this morning. Have tried briefly disabling firewall, clearing cache, restarting laptop and modem, makes no difference. PS also tried Firefox in Safe mode - add-ins disabled - still no joy.