Um, guys... there's a FAQ entry on this. There are two background colors, one of which is in fact the window background color as defined in your global Windows settings. For instance, on my system, that color is a light gray shade, and the background of the emplode window is that shade. You can see this in many of the emplode screen shots that are in the FAQ. The other background color is alternate rows in "view/detail" mode, and it's the subject of that FAQ entry.