I was playing on a server, when I did gave myself Tall Flowers block with the data of 6, my game crashes. Also I was on a server, if you needed to know that.

Crash:

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

Time: 3/15/14 5:04 PM
Description: Rendering item

java.lang.ArrayIndexOutOfBoundsException: 6
at ajl.a(SourceFile:149)
at abf.b_(SourceFile:19)
at aby.j(SourceFile:407)
at aca.c(SourceFile:99)
at box.a(SourceFile:285)
at box.b(SourceFile:400)
at bar.a(SourceFile:744)
at bar.a(SourceFile:123)
at bms.b(SourceFile:834)
at azl.ah(SourceFile:784)
at azl.f(SourceFile:711)
at net.minecraft.client.main.Main.main(SourceFile:148)

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

– Head –
Stacktrace:
at ajl.a(SourceFile:149)
at abf.b_(SourceFile:19)
at aby.j(SourceFile:407)
at aca.c(SourceFile:99)
at box.a(SourceFile:285)

– Item being rendered –
Details:
Item Type: abf@771eeb20
Item Aux: 6
Item NBT: null
Item Foil: false
Stacktrace:
at box.b(SourceFile:400)
at bar.a(SourceFile:744)
at bar.a(SourceFile:123)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bkl['imthepumpkin'/4022, l='MpServer', x=75.45, y=78.62, z=-6.89]]
Chunk stats: MultiplayerChunkCache: 85, 85
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (95,76,202), Chunk: (at 15,4,10 in 5,12; contains blocks 80,0,192 to 95,255,207), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 920180 game time, 950373 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 65 total; [bkl['imthepumpkin'/4022, l='MpServer', x=75.45, y=78.62, z=-6.89], vl['Pig'/2036, l='MpServer', x=18.06, y=63.00, z=56.03], ve['Cow'/830, l='MpServer', x=70.25, y=64.00, z=61.94], rq['entity.ItemFrame.name'/3961, l='MpServer', x=59.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3811, l='MpServer', x=58.06, y=78.50, z=-7.50], rq['entity.ItemFrame.name'/3810, l='MpServer', x=58.06, y=78.50, z=-6.50], rq['entity.ItemFrame.name'/3963, l='MpServer', x=61.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3809, l='MpServer', x=58.06, y=78.50, z=-5.50], rq['entity.ItemFrame.name'/3962, l='MpServer', x=60.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3808, l='MpServer', x=58.06, y=78.50, z=-5.50], rq['entity.ItemFrame.name'/3965, l='MpServer', x=63.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3964, l='MpServer', x=62.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3967, l='MpServer', x=65.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3966, l='MpServer', x=64.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3792, l='MpServer', x=58.06, y=78.50, z=8.50], rq['entity.ItemFrame.name'/3793, l='MpServer', x=58.06, y=78.50, z=7.50], rq['entity.ItemFrame.name'/3794, l='MpServer', x=58.06, y=78.50, z=7.50], rq['entity.ItemFrame.name'/3795, l='MpServer', x=58.06, y=78.50, z=6.50], rq['entity.ItemFrame.name'/3796, l='MpServer', x=58.06, y=78.50, z=5.50], rq['entity.ItemFrame.name'/3797, l='MpServer', x=58.06, y=78.50, z=4.50], rq['entity.ItemFrame.name'/3798, l='MpServer', x=58.06, y=78.50, z=3.50], rq['entity.ItemFrame.name'/3799, l='MpServer', x=58.06, y=78.50, z=2.50], rq['entity.ItemFrame.name'/3800, l='MpServer', x=58.06, y=78.50, z=1.50], rq['entity.ItemFrame.name'/3801, l='MpServer', x=58.06, y=78.50, z=1.50], rq['entity.ItemFrame.name'/3802, l='MpServer', x=58.06, y=78.50, z=0.50], rq['entity.ItemFrame.name'/3803, l='MpServer', x=58.06, y=78.50, z=-0.50], rq['entity.ItemFrame.name'/3804, l='MpServer', x=58.06, y=78.50, z=-1.50], rq['entity.ItemFrame.name'/3805, l='MpServer', x=58.06, y=78.50, z=-2.50], rq['entity.ItemFrame.name'/3806, l='MpServer', x=58.06, y=78.50, z=-3.50], rq['entity.ItemFrame.name'/3807, l='MpServer', x=58.06, y=78.50, z=-4.50], rq['entity.ItemFrame.name'/3783, l='MpServer', x=58.06, y=78.50, z=16.50], rq['entity.ItemFrame.name'/3782, l='MpServer', x=58.06, y=78.50, z=17.50], rq['entity.ItemFrame.name'/3785, l='MpServer', x=58.06, y=78.50, z=14.50], rq['entity.ItemFrame.name'/3784, l='MpServer', x=58.06, y=78.50, z=15.50], rq['entity.ItemFrame.name'/3787, l='MpServer', x=58.06, y=78.50, z=13.50], rq['entity.ItemFrame.name'/3786, l='MpServer', x=58.06, y=78.50, z=13.50], rq['entity.ItemFrame.name'/3789, l='MpServer', x=58.06, y=78.50, z=11.50], rq['entity.ItemFrame.name'/3788, l='MpServer', x=58.06, y=78.50, z=12.50], rq['entity.ItemFrame.name'/3791, l='MpServer', x=58.06, y=78.50, z=9.50], rq['entity.ItemFrame.name'/3790, l='MpServer', x=58.06, y=78.50, z=10.50], rq['entity.ItemFrame.name'/3877, l='MpServer', x=58.06, y=78.50, z=18.50], rq['entity.ItemFrame.name'/3975, l='MpServer', x=72.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3974, l='MpServer', x=71.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3973, l='MpServer', x=70.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3972, l='MpServer', x=69.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3971, l='MpServer', x=68.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3970, l='MpServer', x=67.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3969, l='MpServer', x=66.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3968, l='MpServer', x=66.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3983, l='MpServer', x=78.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3982, l='MpServer', x=78.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3981, l='MpServer', x=77.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3980, l='MpServer', x=76.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3979, l='MpServer', x=75.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3978, l='MpServer', x=74.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3977, l='MpServer', x=73.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3976, l='MpServer', x=72.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3988, l='MpServer', x=83.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3989, l='MpServer', x=84.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3986, l='MpServer', x=81.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3987, l='MpServer', x=82.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3984, l='MpServer', x=79.50, y=78.50, z=-8.94], rq['entity.ItemFrame.name'/3985, l='MpServer', x=80.50, y=78.50, z=-8.94], vf['§a§lWelcome To The Shop!'/3590, l='MpServer', x=72.00, y=134.61, z=20.72], ym['entity.WitherSkull.name'/3591, l='MpServer', x=72.00, y=134.38, z=20.72]]
Retry entities: 0 total; []
Server brand: CraftBukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bkg.a(SourceFile:289)
at azl.b(SourceFile:1947)
at azl.f(SourceFile:720)
at net.minecraft.client.main.Main.main(SourceFile:148)

– System Details –
Details:
Minecraft Version: 1.7.5
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 340341480 bytes (324 MB) / 525860864 bytes (501 MB) up to 9544663040 bytes (9102 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx10G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.7.5
LWJGL: 2.9.1
OpenGL: AMD Radeon HD 8650G GL version 4.2.12420 Compatibility Profile Context 13.151.0.0, ATI Technologies Inc.
GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

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)
Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Anisotropic Filtering: Off (1)