Following the instructions in post below and commenting out the background entry in footer.php, you may find that you have to change the "body {"entry in stylesheet.css to match the background colour set in the Centershop admin.

Instructions (which worked for me)

1. Install Centershop 3 with the footer.php modification from below post (or this post).

2. Change the background of your body to match the colour set in the Centershop admin.

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