I have this problem on both XP and "7"
all my htm/html files got this icon asociated with them
on XP theres IE6 and Firefox 20
on "7" theres Opera 11 and QtWeb
i tried removing all browsers them installing them and use their "make this default browser"
then i tried dis-asociate with 1st and give it to 2nd via "Open with/always"
nothing helps, how to fix this