I am using Ubuntu 12.04 32 bit. My problem is when I select a desktop background, the desktop doesn't update with the new wallpaper. I am unaware of what might be the error. For more clarification look at the image.
EDIT:What ever the wallpaper i have selected now , thats applying as wallpaper after a restart and one more thing is i can add wallpapers but what ever i have selected they are not applying as wallpaper .