When I logged into my creative world that was created with SuperFlat, void particles are appearing and the sky is dark at Y = 4. I re-started Minecraft using 1.6.4 and the problem goes away. I've attached two pictures showing what I am experiencing.
What I expected to happen was...:
Since I am above the bedrock, no void particles should appear.
What actually happened was...:
Void particles appear and the sky turns dark.
Steps to Reproduce:
1. Create a new world using the default settings for SuperFlat. Needs to be in the latest snapshot.
22nd Duplicate of MC-34889 - If you have not, please use the search function in the future, to see if your bug has already been submitted. If you could not find the original report, please comment with the keywords you searched for.