Proper icons can be 'multi-sized'. The .ICO file has an image for 16x16, 32x32 and 64x64. Usually, a person only uses the 32x32 which works for the Start menu and Explorer if large icons are used, but as soon as you use small icons, then the VFP icon displays and this is because .ICO does not have the 16x16 in it as well.