Comment 15 for bug 1095742

Answer to #12 (path stored in the service file is still an absolute path [...] It would probably be better to just strip it when the item is added to the service)

Why store an absolute path at all? Instead of checking and correcting it every time a item is added to the service I would store only the relative path and build the absolute path for runtime use.

In _updateBackgroundAudio the absolute path (os.path.split(bga)[0]) isn't used at all.