fsWipeCache works by wiping the folderswitcher/notification center cache that Apple uses in iOS. these cache(s) prevent theming the folderswitcher/notification center image(s) and must be cleared before they can be customized. apply a theme with a folder/notification center image and then run this application to allow the folder/notification center to be themed. there is a theming guide and help section in the settings app. Works on iOS 4.1+ and now 5.0!