We have an application that works fine on most S60 3rd Ed phones. However, on the Nokia E65 no icon is displayed either in the menu or in the app statusbar. The title of the app is shown in the menu, and the app can be started from the shortcut but no icon is displayed.
Also, the app usually sends itself to the background when not in use. Normally you see a small icon in the top right corner of the shortcut to signal that the app is running. This is not shown either on the E65, although the app is running fine in the background.