Possible Bug: Background Image Upload Error

Hi,

Often I encounter the error as shown in the image when uploading background imag from the Background properties dialog in the designer. Although the image gets added to the library but it does not gets assigned to that layout so I need to again open the layout and choose that image from the background image drop-down (since now it’s in the media library).

I am using CMS 1.7.3

Please can you recreate this on 1.7.4 CMS along with detailed steps to reproduce so we can investigate it?