Is the Samsung default "Internet Browser" based on another build? It seems to have trouble displaying stretched background images correctly, unlike desktop browsers or Chrome for mobile.
Here is the CSS and HTML I am using:
#bk_img {
height:100%;
min-height: 100%;
min-width: 1024px;
width: 100%;
height: auto;
position: fixed;
top: 0;
left: 0;
}
<img src="background.jpg" id="bk_img">
When scrolling down, a white area appears below the background image, approximately 30px high.