The image for the Halloween mashup pack in the Marketplace is advertised as having an orange sky and purple clouds. When the texture pack in enabled in game, the clouds are white and sky is light blue, despite the image in the Marketplace having led me to believe otherwise.

TO REPRODUCE

Download the Halloween mashup pack from the Marketplace. Enable it as your only global resource. Load a world and look at the sky and clouds.

SOLUTIONS

There are two ways the problem can be fixed.
1. The pack is updated to make the sky orange and clouds purple.
2. The Marketplace image is changed to have a light blue sky and white clouds.