Blocks are black, blue and flashing!

Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft|http://hopper.minecraft.net/help/finding-minecraft-data-folder]/crash-reports/crash-<DATE>-client.txt) here.

It looks like:
-You are glitching partially underground. Are you?
-A very big structure above you and casting an unloaded shadow mass.

But most of all, the black and blue blocks, is a shader on (Super Secret Settings. Doesn't work for me so I don't know)? Try pressing F4 to make it normal again, if that does not work, I have no idea.

Ok, I got the crash report:

Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 1/13/15 12:35 PM
Description: Manually triggered debug crash

java.lang.Throwable
at bss.r(SourceFile:1570)
at bss.at(SourceFile:880)
at bss.a(SourceFile:317)
at net.minecraft.client.main.Main.main(SourceFile:124)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at cem.a(SourceFile:308)

– Affected level –
Details:
Level name: MpServer
All players: 27 total; [cin['HowBabysRBrn'/4399068, l='MpServer', x=-1.71, y=75.00, z=4.88], cio['JoshIsTheBosh'/4396791, l='MpServer', x=0.50, y=76.00, z=0.50], cio['AndreiOlteanuRO'/4397530, l='MpServer', x=0.31, y=77.00, z=14.31], cio['xxLexxiNicollexx'/4398093, l='MpServer', x=0.50, y=76.00, z=0.50], cio['16MichA12'/4396062, l='MpServer', x=-10.41, y=75.00, z=1.09], cio['uprightrelic958'/4392275, l='MpServer', x=-2.88, y=75.00, z=8.06], cio['GOFutureHD'/4396946, l='MpServer', x=-4.03, y=75.00, z=-6.09], cio['KondziouPL'/4398929, l='MpServer', x=-2.53, y=75.00, z=-7.53], cio['JuJubsz'/4398924, l='MpServer', x=-2.78, y=77.00, z=-12.00], cio['ritchi92'/4382348, l='MpServer', x=11.06, y=68.00, z=45.31], cio['xxgamerlegden1'/4398833, l='MpServer', x=-8.38, y=68.00, z=52.09], cio['GreavesGremlin'/4380323, l='MpServer', x=-22.94, y=72.00, z=1.94], cio['justTrintex'/4398006, l='MpServer', x=-45.69, y=73.50, z=15.34], cio['ugurtngr'/4398915, l='MpServer', x=2.04, y=75.78, z=10.64], cio['diegosteel19'/4398731, l='MpServer', x=-38.91, y=73.00, z=0.50], cio['danmac1309'/4395523, l='MpServer', x=-41.69, y=73.00, z=-0.47], cio['schoggi34'/4399108, l='MpServer', x=-26.40, y=73.00, z=28.67], cio['ORIN7173'/4399114, l='MpServer', x=-25.89, y=72.00, z=34.31], cio['BoomerBubbles'/4291909, l='MpServer', x=7.56, y=68.00, z=50.28], cio['Sams_2001'/4399466, l='MpServer', x=-1.25, y=76.00, z=0.50], cio['Pulsar505'/4399477, l='MpServer', x=11.06, y=68.00, z=44.09], cio['iIi3BOOODiIi'/4398905, l='MpServer', x=-19.89, y=73.20, z=-25.66], cio['MAGICNINJASKILLZ'/4399622, l='MpServer', x=-39.38, y=73.00, z=-11.25], cio['DeviceMC'/4399646, l='MpServer', x=10.41, y=68.00, z=48.34], cio['Pupinjo'/4399647, l='MpServer', x=10.91, y=68.00, z=46.53], cio['ryoxpvp'/4399660, l='MpServer', x=0.50, y=76.00, z=0.50], cio['softmann123'/4399818, l='MpServer', x=-1.56, y=75.50, z=-0.50]]
Chunk stats: MultiplayerChunkCache: 121, 121
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 0.00,76.00,0.00 - World: (0,76,0), Chunk: (at 0,4,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 15963759 game time, 386000 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 74 total; [cin['HowBabysRBrn'/4399068, l='MpServer', x=-1.71, y=75.00, z=4.88], agh['§e§lSwag Hat Shop'/128, l='MpServer', x=-10.50, y=75.00, z=5.50], cio['ugurtngr'/4398915, l='MpServer', x=2.04, y=75.78, z=10.64], agh['§e§lAuntie Pauline'/129, l='MpServer', x=-10.50, y=75.00, z=-4.50], cio['JoshIsTheBosh'/4396791, l='MpServer', x=0.50, y=76.00, z=0.50], agn['§e§lCredits to Tokens'/130, l='MpServer', x=11.50, y=75.00, z=-4.50], agn['§e§lTokens to Credits'/131, l='MpServer', x=11.50, y=75.00, z=5.50], cio['AndreiOlteanuRO'/4397530, l='MpServer', x=0.31, y=77.00, z=14.31], cio['xxLexxiNicollexx'/4398093, l='MpServer', x=0.50, y=76.00, z=0.50], cio['BoomerBubbles'/4291909, l='MpServer', x=7.56, y=68.00, z=50.28], cio['crazypeacock123'/4399063, l='MpServer', x=-51.22, y=73.00, z=1.31], agn['§e§lArcher Aaron'/134, l='MpServer', x=9.97, y=68.00, z=39.00], cio['16MichA12'/4396062, l='MpServer', x=-10.41, y=75.00, z=1.09], cio['uprightrelic958'/4392275, l='MpServer', x=-2.88, y=75.00, z=8.06], cio['softmann123'/4399818, l='MpServer', x=-1.56, y=75.50, z=-0.50], cio['GOFutureHD'/4396946, l='MpServer', x=-4.03, y=75.00, z=-6.09], cio['KondziouPL'/4398929, l='MpServer', x=-2.53, y=75.00, z=-7.53], cio['JuJubsz'/4398924, l='MpServer', x=-2.78, y=77.00, z=-12.00], cio['clemclo91'/4398720, l='MpServer', x=-33.16, y=75.27, z=48.65], cio['crystalshadow11'/4398410, l='MpServer', x=-8.84, y=75.00, z=3.00], cio['JuJubsz'/4398924, l='MpServer', x=-2.78, y=77.00, z=-12.00], cio['uprightrelic958'/4392275, l='MpServer', x=-2.88, y=75.00, z=8.06], cio['LexarKaan'/4398834, l='MpServer', x=11.06, y=68.00, z=46.53], cio['KondziouPL'/4398929, l='MpServer', x=-2.53, y=75.00, z=-7.53], cio['ritchi92'/4382348, l='MpServer', x=11.06, y=68.00, z=45.31], cio['xxgamerlegden1'/4398833, l='MpServer', x=-8.38, y=68.00, z=52.09], cio['GreavesGremlin'/4380323, l='MpServer', x=-22.94, y=72.00, z=1.94], cio['justTrintex'/4398006, l='MpServer', x=-45.69, y=73.50, z=15.34], cio['ugurtngr'/4398915, l='MpServer', x=2.04, y=75.78, z=10.64], cio['diegosteel19'/4398731, l='MpServer', x=-38.91, y=73.00, z=0.50], cio['danmac1309'/4395523, l='MpServer', x=-41.69, y=73.00, z=-0.47], cio['AndreiOlteanuRO'/4397530, l='MpServer', x=0.31, y=77.00, z=14.31], cio['bigdragon_BEST'/4399071, l='MpServer', x=-1.44, y=76.00, z=-10.69], cio['Mace_MH'/4399085, l='MpServer', x=48.63, y=73.85, z=0.50], cio['philonickel'/4399089, l='MpServer', x=0.50, y=85.00, z=0.50], cio['gima366'/4399095, l='MpServer', x=50.75, y=73.00, z=45.63], cio['schoggi34'/4399108, l='MpServer', x=-26.40, y=73.00, z=28.67], cio['ORIN7173'/4399114, l='MpServer', x=-25.89, y=72.00, z=34.31], cio['BoomerBubbles'/4291909, l='MpServer', x=7.56, y=68.00, z=50.28], cio['Sams_2001'/4399466, l='MpServer', x=-1.25, y=76.00, z=0.50], cio['Pulsar505'/4399477, l='MpServer', x=11.06, y=68.00, z=44.09], cio['epicguy_56'/4399009, l='MpServer', x=-51.19, y=73.59, z=1.03], cio['fiwe00'/4399480, l='MpServer', x=-27.78, y=72.00, z=2.09], cio['Sams_2001'/4399466, l='MpServer', x=-1.25, y=76.00, z=0.50], cio['Marcus_51'/4399486, l='MpServer', x=48.66, y=74.16, z=-0.63], cio['iIi3BOOODiIi'/4398905, l='MpServer', x=-19.89, y=73.20, z=-25.66], cio['Nigu03'/4399523, l='MpServer', x=-2.47, y=75.00, z=0.53], cio['jenob'/4399106, l='MpServer', x=-50.78, y=74.15, z=45.48], cio['xxgamerlegden1'/4398833, l='MpServer', x=-8.38, y=68.00, z=52.09], cio['WeSs4mX2001'/4399541, l='MpServer', x=11.06, y=68.00, z=46.97], cio['JoshIsTheBosh'/4396791, l='MpServer', x=0.50, y=76.00, z=0.50], cio['Pulsar505'/4399477, l='MpServer', x=11.06, y=68.00, z=44.09], cio['MAGICNINJASKILLZ'/4399622, l='MpServer', x=-39.38, y=73.00, z=-11.25], cio['Sweet20112'/4399632, l='MpServer', x=0.50, y=76.00, z=0.50], cio['DeviceMC'/4399646, l='MpServer', x=10.41, y=68.00, z=48.34], cio['Pupinjo'/4399647, l='MpServer', x=10.91, y=68.00, z=46.53], cio['danmac1309'/4395523, l='MpServer', x=-41.69, y=73.00, z=-0.47], cio['MAGICNINJASKILLZ'/4399622, l='MpServer', x=-39.38, y=73.00, z=-11.25], cio['ryoxpvp'/4399660, l='MpServer', x=0.50, y=76.00, z=0.50], cio['schoggi34'/4399108, l='MpServer', x=-26.40, y=73.00, z=28.67], cio['firepit84'/4399673, l='MpServer', x=-2.84, y=75.00, z=3.06], cio['diegosteel19'/4398731, l='MpServer', x=-38.91, y=73.00, z=0.50], cio['ORIN7173'/4399114, l='MpServer', x=-25.89, y=72.00, z=34.31], cio['xxLexxiNicollexx'/4398093, l='MpServer', x=0.50, y=76.00, z=0.50], cio['ritchi92'/4382348, l='MpServer', x=11.06, y=68.00, z=45.31], cio['GOFutureHD'/4396946, l='MpServer', x=-4.03, y=75.00, z=-6.09], cio['Pupinjo'/4399647, l='MpServer', x=10.91, y=68.00, z=46.53], cio['softmann123'/4399818, l='MpServer', x=-1.56, y=75.50, z=-0.50], cio['16MichA12'/4396062, l='MpServer', x=-10.41, y=75.00, z=1.09], cio['DeviceMC'/4399646, l='MpServer', x=10.41, y=68.00, z=48.34], cio['GreavesGremlin'/4380323, l='MpServer', x=-22.94, y=72.00, z=1.94], cio['ryoxpvp'/4399660, l='MpServer', x=0.50, y=76.00, z=0.50], cio['justTrintex'/4398006, l='MpServer', x=-45.69, y=73.50, z=15.34], cio['iIi3BOOODiIi'/4398905, l='MpServer', x=-19.89, y=73.20, z=-25.66]]
Retry entities: 0 total; []
Server brand: BeeCord (1.8) <- Spigot
Server type: Non-integrated multiplayer server
Stacktrace:
at cem.a(SourceFile:308)
at bss.b(SourceFile:2278)
at bss.a(SourceFile:326)
at net.minecraft.client.main.Main.main(SourceFile:124)

– System Details –
Details:
Minecraft Version: 1.8.1
Operating System: Windows 8.1 (x86) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 100806064 bytes (96 MB) / 288509952 bytes (275 MB) up to 523501568 bytes (499 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.8.1
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 10.18.10.3958, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)

So nobody knows why? D:

As indicated in the report this duplicates, it appears to be resolved in 1.8.2 pre-releases.