What does icon do? what name must a jpg have to be shown in that field?
If you don't see any external filename pattern for the "icon" type anywhere, it probably means that there really is none.
Feature: Only display art for playing track (don't follow selection)
front.jpg workssomename front.jpg does notetc.
Sorry for intervene but is it possible to delete embedded cover-art with foobar? I can't find such a function.