As stated, it only works in singleplayer, where you can actually pause gameplay entirely.
Please add a description.
Please visit https://help.mojang.com/ instead.
Confirmed for 14w29a.
EDIT: This is because of the filename of the sound files. Delete your assets folder, then disable Kaspersky Anti-Banner or any software like that.
Custom skin layers are not necessary.
You can start seeing the moon through the ground at Y: 310.3
If you don't think it's a bug, don't post it.