Can't Close the Import window with Close button or Command + W

Has the behavior for the Close command been changed in the Import window? I know I used to be able to import the images from my camera and then click the Close button to go back to the main screen. Now clicking does nothing and so does Command + W. I notice Close is defined as “Close document” but I thought it used to close the Import window also. Now I have to use the little built in Windows close button.