Just made another test:
-In flash, it honors it within the boundaries of the actor's sprite. I mean, take a smiley for example: the mouth and eyes honor the setting, but the smiley outline with the background of the scene is Aantialiased. This doesn't happen in windows.
-HTML5 is always on.
-Windows is the opposite of flash. If OFF, it works properly. If ON, only the outline with the background is antialiased. The eyes and mouth of our hypotetical smiley actor are not antialised.
Attached images describe the problem.