Do StreamedScenes contain rendering settings data?

I save a BuildOptions.BuildAdditionalStreamedScenes webplayer datafile, then later load it with Application.LoadLevelAdditive.

The contents of the scene I had saved load correctly, but the scene's rendering settings (skybox, fog settings, etc) do not load.

Why aren't the StreamedScene's RenderingSettings loaded along with the scene's objects? What do I need to do to get the RenderingSettings to load?

As for most the current behavior is the wanted behavior. You could easily add what you want by adding an gameobject with script to your (additive) scene that is a container for all RenderSettings global vars values and just do in Awake something like:

var fog : boolean;
var fogColor : Color;
var fogDensity : float;
var ambientLight : Color;
var haloStrength : float;
var flareStrength : float;
var skybox : Material;

function Reset() {
    fog = RenderSettings.fog;
    fogColor = RenderSettings.fogColor;
    fogDensity = RenderSettings.fogDensity;
    ambientLight = RenderSettings.ambientLight;
    haloStrength = RenderSettings.haloStrength;
    flareStrength = RenderSettings.flareStrength;
    skybox = RenderSettings.skybox;
}

function Awake() {
    RenderSettings.fog = fog;
    RenderSettings.fogColor = fogColor;
    RenderSettings.fogDensity = fogDensity;
    RenderSettings.ambientLight = ambientLight;
    RenderSettings.haloStrength = haloStrength;
    RenderSettings.flareStrength = flareStrength;
    RenderSettings.skybox = skybox;
}

When you have added a gameobject with this script to your scene, you can save the rendersettings to the object's script properties by using the inspector and click on the cog besides the script name and choose Reset from dropdown menu.