Excuse me for the vague description I am about to give.

To put it simply, the super-secret settings don't seem to do anything, regardless of others able to activate a variety of shaders, without having to look into %appdata% and such.

Not sure if system dependent, graphics card dependent or an optional setting. The menu doesn't give me the 'old graphics card' warning for the new OpenGL in the future as it does on other computers.

The shaders folder in the minecraft jar exists with it's json contents, but does nothing in game.

The manual debug crash says it has two JVM Flags:

JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M

I am unsure if the first JVM Flag is supposed to be there, and if it can be toggled at all.

Steps to reproduce:
1.Re-download launcher.
2.Delete .minecraft whilst backing up saves
3.Run the launcher
4.Login to re-create your profile
5.Enable snapshot versions and click 13w38c
6.Click the Play button whilst connected to the internet
7.Wait for download.
8.Put back the saves folder
9.Click single player and go to a world
10.Go to options and click super-secret settings as many times as you want
11.Shaders will not work.
12.Create new world, and enter it.
13. Repeat step 10.
14. Shaders still won't work.