Setting the background image to 'None' after you 'Load...' an image does not work.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
A 3D View background can be set as 'single color', 'gradient' or 'image'. When you set the background as 'image', the default image is 'None'. You can load one or more images which appear in the combo-box. You can switch between the images however when you select 'None' (no image) the previous image is still displayed in the view.