Css class: .dynamik-content-filler-img

Why is this css class being generated: .dynamik-content-filler-img and why does it have "Height: 1px !important" ?

Its adding a 1px line at the end of the body before the footer of my website. Any one have an idea what it is for?
Click the question mark next to the content filler image option at the bottom of the Content option page and it explains it to you. It's always a good idea to check out what explanation has been written for each option if there is a question mark next to it. Hope that helps.