Mojang branded screen

hola hoy quiero reportar el error de minecraft es que se me traba en la pantalla mojang se queda ahi y no carga desde la snapshot 14w28b no me funciona ¿algo nuevo que hallan añadido? cuando entro a la 1.8 cuando dice mojang lo cierro se me abre automaticamente el launcher y me dice esto [22:44:02] [Client thread/INFO]: Setting user: DaviEleven_89
[22:44:03] [Client thread/INFO]: (Session ID is token:3c4ac41cfa994f50856e94d1e3727ab7:46e58cfbeea54182ab00d80d0c36169d)
[22:44:10] [Client thread/INFO]: LWJGL Version: 2.9.1
[22:44:10] [Client thread/INFO]: Reloading ResourceManager: Default, DavidYTCraft (V.5PVP)64x64.zip
[22:44:23] [Sound Library Loader/INFO]: Starting up SoundSystem...
[22:44:23] [Thread-6/INFO]: Initializing LWJGL OpenAL
[22:44:23] [Thread-6/INFO]: (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
[22:44:24] [Thread-6/INFO]: OpenAL initialized.
[22:44:24] [Sound Library Loader/INFO]: Sound engine started
[22:44:33] [Client thread/INFO]: Created: 2048x1024 textures-atlas
[22:44:37] [Client thread/WARN]: Failed to load shader: minecraft:shaders/post/entity_outline.json
ox: Invalid shaders/program/sobel.vsh: Couldn't compile vertex program: Vertex shader failed to compile with the following errors:
ERROR: 0:1: '' : Version number not supported by GL2
ERROR: 1 compilation errors. No code generated.
at cti.a(SourceFile:67) ~[1.8.1.jar:?]
at ctf.<init>(SourceFile:132) ~[1.8.1.jar:?]
at cth.<init>(SourceFile:26) ~[1.8.1.jar:?]
at ctg.a(SourceFile:268) ~[1.8.1.jar:?]
at ctg.a(SourceFile:138) ~[1.8.1.jar:?]
at ctg.a(SourceFile:86) ~[1.8.1.jar:?]
at ctg.<init>(SourceFile:52) ~[1.8.1.jar:?]
at ckn.b(SourceFile:224) [1.8.1.jar:?]
at bss.ak(SourceFile:487) [1.8.1.jar:?]
at bss.a(SourceFile:302) [1.8.1.jar:?]
at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.1.jar:?]
What I can do? could help me I am very desperate all servers are updated to 1.8 and I can only be in the 1.7.x