I installed Firefox. Dragged Firefox logo to applications folder, but what is displayed is a different logo, with a white circle, and a slash through the circle (like the red slashed circle over a car to symbolize "no parking" on a street sign). When I dragged that logo to the task bar, the correct Firefox logo appears on the task bar, but in my applications folder, the strange logo is still there. Not sure if this means that there is a problem with Install -- no error messages were displayed during install.