IE 11, Display Mixed Content set as Enabled, still popup comes every time.it does not on IE 9.

I am using IE 11 .

When i am trying to connect Intranet site built on Office online in IE11, I am getting the Display mixed Content error.

it is not coming in IE9.

Please find my setting in below image.

FYI. Sharpoint URL is HTTPS

There is one SIlverlight webpart, which consumes yahoo weather services to display weather on home page.

this yahoo weather service is "http://weather.yahooapis.com/forecastrss?w=XXXXXX&u=f".

I believe that because of this non HTTPS url, I am getting this popup, but my question is, the settings are there to override this behavior and  it is doing exactly the same in IE9, but not in IE11.

Can some one please help, as this is very annoying for the end users.