Weird Skybox

I'm not sure if this is a known bug for WP8 platform, but I have scene where a Skybox seems to be rotated -90 degrees on z axis. It works perfectly on editor and others platforms. I'm using a Lumia 520.

Any help?

Thanks in advance.

EDIT:

I've just noticed this problem only happens for landscape orientation. Portrait makes the Skybox render correctly.

There's one more important thing: this strange behavior is happening to RenderTextures too. To workaround I'm rotating -90 or 90 degrees the RenderTexture camera depending on landscape orientation (left or right).