UPDATE: Minecraft snapshot 16w21b is now available
Bugs fixed in 16w21b:
- [Bug MC-102509] - Block breaking / fallingdust particles have the wrong colour
- [Bug MC-102511] - Lava texture is incorrectly displayed
- [Bug MC-102524] - Lighting bug in inventory
- [Bug MC-102543] - Everything related to structure blocks is black
Please report any and all bugs you find in Minecraft to bugs.mojang.com. If nobody reports a bug, we can’t fix it!
To get snapshots, open your launcher and press the “New Profile” button. Call it “snapshots” and check the box saying “Enable experimental development snapshots” and save. To switch to the normal version, you can select it in the dropdown at the bottom left corner of the launcher. Back up your world first or run the game on in a different folder (See the “new profile” dialog).
Snapshots can corrupt your world, please backup and/or run them in a different folder from your main worlds. 
