[Plugin: Profilactic] WTFMO Profilactic icon

In IE6 the icon for profilactic in the WTFMO widget cannot be displayed as it is a .ico (not a .png). I have fixed this by downloading the .ico, saving it as a .png, uploading it to my site, and using a custom icon for it. I was thinking that it should be changed so it uses a .png icon (perhaps distributed with the plugin) instead of a .ico, which not all browsers can display