I clicked multiplayer on the main menu. Hopefully the bug report explains the rest.
Environment
OS: Windows 8.1 (ver 6.3, arch amd64)
Java: 1.8.0_25 (by Oracle Corporation)
Launcher: Minecraft Launcher 1.6.11 (bootstrap 100)
Minecraft: 1.8.7 (updated Fri Jun 05 05:10:44 CDT 2015)
Every other menu works fine.