Alpha Torbutton consistently fails proxy test
Running Firefox 4.0.1 installed and reinstalled the tor button 3 times. Each time when the browser was restarted and the button pressed the attached message was displayed. If run anyway no navigation was possible, every page gave the error message that it was unable to connect. No changes from the default were made before the message appeared. I could not find a similar ticket, but it is entirely likely this issue is too simplistic to require one.