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Facebook's New Page Layout (Aug 23 2010)
Starting Aug 23, Facebook will be rolling out a new layout for Facebook pages and profiles. This change will affect your storefront in two ways:

The profile box will disappear
The tiny little boxes that used to display items from your storefront will no longer be available. Facebook is removing them across the board, from all user profiles and pages.

The Storefront tab is now smaller
This will affect the Storefront tab on both your personal profile as well as your Facebook Fan Pages. Netcarnation Marketplace has already been modified to fit into the new layout. So you don't need to do anything to get your storefront working. However, please note that we now recommend that the storefront logo be no wider than 500 pixels (This was previously 700 pixels). If you have a logo wider than 500px, you should resize your logo image to 500px for best results.

Please post all questions related to the new Facebook layout here: http://www.facebook.com/topic.php?uid=240215218058&topic=16489