Yes. The header image is missing and I cannot see any background images. I am viewing a sea of yellow using Firefox 5.0. When you CSS edit a theme you no longer use the header image uploader. Instead you place the header image URL in the CSS stylesheet.
Tip: When you alter a theme’s stylesheet, you only need to put in the Editor the modification/additions to the CSS, not the entire thing. Read this for more info:
I will flag this thread so it gets moved to the CSS Forum where either Staff or another Volunteer will help you.