Hummingbird Minification Removes Home Page Background Image

When I activate Minification in Hummingbird, the background image on the home page disappears. I tried turning off the setting in the program, so that I could still test the results of moving some of the problem files to the footer. But it does not solve the problem. The only way I can see my image is to disable Minification completely. Can you help? Support is enabled.