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---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!
Time: 8/22/13 7:14 PM
Description: Unexpected error
java.lang.NullPointerException
at bda.J(SourceFile:239)
at ats.k(SourceFile:1400)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at bda.J(SourceFile:239)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [bdf['LBPRblx'/31711, l='MpServer', x=218.83, y=76.96, z=292.90]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (232,64,256), Chunk: (at 8,4,0 in 14,16; contains blocks 224,0,256 to 239,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 26240 game time, 35905 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: 68 total; [ry['Sheep'/273, l='MpServer', x=170.91, y=69.00, z=322.06], rp['Chicken'/272, l='MpServer', x=219.59, y=63.00, z=223.41], tv['Zombie'/82621, l='MpServer', x=291.47, y=27.00, z=239.94], sr['item.tile.sapling.oak'/82313, l='MpServer', x=209.22, y=77.13, z=346.16], tq['Skeleton'/81817, l='MpServer', x=259.50, y=18.00, z=308.50], bev['GravityMan45'/64652, l='MpServer', x=216.72, y=76.47, z=291.09], te['Creeper'/82578, l='MpServer', x=242.50, y=26.00, z=291.50], ts['Spider'/82336, l='MpServer', x=207.50, y=33.00, z=258.50], rp['Chicken'/316, l='MpServer', x=218.25, y=63.00, z=216.81], sr['item.item.egg'/79109, l='MpServer', x=210.00, y=64.13, z=233.25], ts['Spider'/82338, l='MpServer', x=207.50, y=33.00, z=260.50], rp['Chicken'/292, l='MpServer', x=204.41, y=70.00, z=292.44], rp['Chicken'/293, l='MpServer', x=278.63, y=63.00, z=212.44], ry['Sheep'/294, l='MpServer', x=262.24, y=64.00, z=343.50], bdf['LBPRblx'/31711, l='MpServer', x=218.83, y=76.96, z=292.90], rn['Bat'/82683, l='MpServer', x=298.09, y=30.73, z=287.11], rp['Chicken'/77, l='MpServer', x=141.38, y=64.00, z=298.41], rp['Chicken'/3227, l='MpServer', x=153.47, y=64.00, z=355.66], tq['Skeleton'/82130, l='MpServer', x=226.50, y=37.00, z=288.50], rp['Chicken'/347, l='MpServer', x=287.56, y=71.00, z=297.47], tv['Zombie'/82133, l='MpServer', x=227.50, y=37.00, z=286.50], bev['GravityMan45'/64652, l='MpServer', x=222.91, y=69.00, z=286.56], rp['Chicken'/321, l='MpServer', x=218.71, y=64.00, z=240.71], tv['Zombie'/82660, l='MpServer', x=199.31, y=40.00, z=271.69], tv['Zombie'/82661, l='MpServer', x=202.55, y=33.89, z=280.69], ry['Sheep'/330, l='MpServer', x=240.69, y=67.00, z=311.53], sr['item.tile.sapling.oak'/81871, l='MpServer', x=208.88, y=79.13, z=345.22], tq['Skeleton'/81146, l='MpServer', x=273.09, y=49.00, z=310.28], sb['Squid'/81907, l='MpServer', x=250.81, y=59.00, z=302.50], tv['Zombie'/82412, l='MpServer', x=171.97, y=49.00, z=230.53], tv['Zombie'/82413, l='MpServer', x=179.25, y=47.00, z=231.00], tv['Zombie'/82414, l='MpServer', x=187.13, y=49.00, z=233.38], tv['Zombie'/82415, l='MpServer', x=179.56, y=47.00, z=228.50], rp['Chicken'/111, l='MpServer', x=170.63, y=65.00, z=343.47], ry['Sheep'/118, l='MpServer', x=195.84, y=66.00, z=315.13], rp['Chicken'/358, l='MpServer', x=266.53, y=64.00, z=255.47], sb['Squid'/81902, l='MpServer', x=257.81, y=60.00, z=305.56], te['Creeper'/82183, l='MpServer', x=271.50, y=48.00, z=310.50], te['Creeper'/82182, l='MpServer', x=271.50, y=48.00, z=308.50], te['Creeper'/82181, l='MpServer', x=269.50, y=48.00, z=308.50], sr['item.item.egg'/82733, l='MpServer', x=200.44, y=68.13, z=291.66], rp['Chicken'/133, l='MpServer', x=183.31, y=67.00, z=367.34], rp['Chicken'/134, l='MpServer', x=157.44, y=65.00, z=341.41], tf['Enderman'/82198, l='MpServer', x=256.50, y=64.00, z=264.50], sr['item.tile.sapling.oak'/81927, l='MpServer', x=208.53, y=73.13, z=351.78], tq['Skeleton'/82204, l='MpServer', x=275.50, y=40.00, z=217.50], tv['Zombie'/82205, l='MpServer', x=276.50, y=40.00, z=222.50], tv['Zombie'/82203, l='MpServer', x=137.50, y=20.00, z=327.50], tv['Zombie'/81454, l='MpServer', x=175.50, y=27.00, z=232.50], tq['Skeleton'/81449, l='MpServer', x=151.50, y=46.00, z=223.50], te['Creeper'/82699, l='MpServer', x=259.50, y=47.00, z=339.50], bev['GravityMan45'/64652, l='MpServer', x=218.53, y=70.02, z=292.16], te['Creeper'/82700, l='MpServer', x=255.02, y=45.00, z=338.72], tq['Skeleton'/82710, l='MpServer', x=217.41, y=6.00, z=330.84], tq['Skeleton'/82711, l='MpServer', x=219.50, y=6.00, z=329.50], te['Creeper'/82708, l='MpServer', x=218.53, y=6.00, z=330.34], te['Creeper'/82709, l='MpServer', x=218.00, y=6.00, z=331.66], ts['Spider'/82551, l='MpServer', x=273.97, y=30.00, z=368.16], tq['Skeleton'/82558, l='MpServer', x=270.50, y=47.00, z=319.31], tv['Zombie'/82557, l='MpServer', x=270.53, y=47.00, z=320.16], tf['Enderman'/82015, l='MpServer', x=147.91, y=47.00, z=221.00], rp['Chicken'/218, l='MpServer', x=166.59, y=64.00, z=364.59], rp['Chicken'/219, l='MpServer', x=185.68, y=68.00, z=324.59], rp['Chicken'/214, l='MpServer', x=205.53, y=64.00, z=333.47], ry['Sheep'/215, l='MpServer', x=183.66, y=65.00, z=351.50], rp['Chicken'/237, l='MpServer', x=198.81, y=63.00, z=230.19], ry['Sheep'/254, l='MpServer', x=202.50, y=76.00, z=355.50], ry['Sheep'/255, l='MpServer', x=206.50, y=76.00, z=352.50]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bda.a(SourceFile:284)
at ats.b(SourceFile:1761)
at ats.d(SourceFile:633)
at net.minecraft.client.main.Main.main(SourceFile:101)
-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 208777328 bytes (199 MB) / 293994496 bytes (280 MB) up to 1908932608 bytes (1820 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G
AABB Pool Size: 956 (53536 bytes; 0 MB) allocated, 874 (48944 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
Launched Version: 1.6.2
LWJGL: 2.9.0
OpenGL: AMD Radeon HD 6670 GL version 4.2.12217 Compatibility Profile Context 12.104.0.0, ATI Technologies Inc.
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Pack: Default
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1373 (76888 bytes; 0 MB) allocated, 266 (14896 bytes; 0 MB) used

Was playing on a Bukkit server with a friend. I've crashed three times playing on his server.
Sorry if this is the wrong forum topic, couldn't find any other place to post this.

Using my notsogreat skills at reading error logs, it looks like you need to lower your render distance.

Also, if this doesnt help you should post info such as dxdiag data and what causes the crash, do you walk around for a while then it crashes, or is it as soon as you try to join?