In my desktop AIR app all 4 icons (16, 32, 48, 128) are set. All icons (desktop, systray, changing apps with alt+tab, quick launch bar) are working perfectly, but title icon (taskbar and app window) are wrong. Windows use bigger icon in this case and resize it to 16×16. Why Windows do not use original 16×16 icon?
See attached picture - top icon from quick launch bar is original 16×16 png, bottom icon is 32×32 or 48×48 resized to 16×16.