Affects Version/s: Minecraft 15w49b, Minecraft 15w50a, Minecraft 15w51b, Minecraft 16w02a, Minecraft 16w03a, Minecraft 16w04a, Minecraft 16w05a, Minecraft 16w05b
Fix Version/s: Minecraft 16w06a
Minecraft Version: 15w50a
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.8.0_65, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode),
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
I have some string on my roof in my single player. but when I updated to 50a the string was gone and my house was on fire. Used a backup from before snapshot and in 47c its still there. tried to update to 50a again and it was gone.
Also see screenshots
With string is 15w47c
Without string is 15w50a