Put the summary of the bug you're having here

*What I expected to happen was...:
Opening server and staying open

What actually happened was...:
Crash

Steps to Reproduce:
1. Open up MC
2. Click on Multiplayer
3. Go on a server
4. If doesnt work type in a command

Attachment of crash report is included below:

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 7/11/13 4:47 PM
Description: Deserializing Message

java.lang.ClassCastException: com.google.gson.JsonPrimitive cannot be cast to com.google.gson.JsonObject
at cw.a(SourceFile:14)
at cw.deserialize(SourceFile:10)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:761)
at com.google.gson.Gson.fromJson(Gson.java:710)
at com.google.gson.Gson.fromJson(Gson.java:682)
at cu.c(SourceFile:220)
at bct.a(SourceFile:522)
at dl.a(SourceFile:49)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)
at bda.b(SourceFile:60)
at ats.k(SourceFile:1386)
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 cw.a(SourceFile:14)
at cw.deserialize(SourceFile:10)
at com.google.gson.TreeTypeAdapter.read(TreeTypeAdapter.java:58)
at com.google.gson.Gson.fromJson(Gson.java:795)
at com.google.gson.Gson.fromJson(Gson.java:761)
at com.google.gson.Gson.fromJson(Gson.java:710)
at com.google.gson.Gson.fromJson(Gson.java:682)

– Serialized Message –
Details:
JSON string: Cannot send chat message.
Stacktrace:
at cu.c(SourceFile:220)
at bct.a(SourceFile:522)
at dl.a(SourceFile:49)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bdf['DragonGam3r'/170081, l='MpServer', x=642.94, y=64.62, z=-1580.95]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (999807,48,416), Chunk: (at 15,3,0 in 62487,26; contains blocks 999792,0,416 to 999807,255,431), Region: (1952,0; contains chunks 62464,0 to 62495,31, blocks 999424,0,0 to 999935,255,511)
Level time: 224582074 game time, 1940440446 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: 63 total; [bdf['DragonGam3r'/170081, l='MpServer', x=642.94, y=64.62, z=-1580.95], ok['Painting'/170101, l='MpServer', x=616.00, y=63.50, z=-1661.06], rr['Horse'/170114, l='MpServer', x=597.39, y=64.06, z=-1651.72], ok['Painting'/170100, l='MpServer', x=619.50, y=63.50, z=-1661.06], tf['Enderman'/170112, l='MpServer', x=576.66, y=36.00, z=-1516.75], ry['Sheep'/170113, l='MpServer', x=587.34, y=66.00, z=-1642.53], ok['Painting'/170118, l='MpServer', x=619.50, y=64.50, z=-1664.94], ok['Painting'/170119, l='MpServer', x=618.50, y=65.50, z=-1664.94], ok['Painting'/170116, l='MpServer', x=619.50, y=63.50, z=-1664.94], rn['Bat'/170271, l='MpServer', x=658.43, y=17.24, z=-1527.59], ok['Painting'/170117, l='MpServer', x=618.50, y=64.00, z=-1664.94], ok['Painting'/170109, l='MpServer', x=618.94, y=65.50, z=-1663.50], rp['Chicken'/170123, l='MpServer', x=577.44, y=64.00, z=-1659.53], ok['Painting'/170108, l='MpServer', x=619.94, y=64.50, z=-1662.50], ok['Painting'/170120, l='MpServer', x=615.50, y=65.50, z=-1664.94], ok['Painting'/170107, l='MpServer', x=616.50, y=65.50, z=-1661.06], rp['Chicken'/170121, l='MpServer', x=573.38, y=68.00, z=-1639.53], ok['Painting'/170106, l='MpServer', x=615.50, y=65.50, z=-1661.06], ok['Painting'/170105, l='MpServer', x=617.50, y=65.50, z=-1661.06], ok['Painting'/170104, l='MpServer', x=618.50, y=65.50, z=-1661.06], ok['Painting'/170103, l='MpServer', x=619.50, y=64.50, z=-1661.06], ok['Painting'/170102, l='MpServer', x=617.50, y=63.50, z=-1661.06], ok['Painting'/170116, l='MpServer', x=619.50, y=63.50, z=-1664.94], ok['Painting'/170117, l='MpServer', x=618.50, y=64.00, z=-1664.94], ok['Painting'/170118, l='MpServer', x=619.50, y=64.50, z=-1664.94], ok['Painting'/170110, l='MpServer', x=618.94, y=65.50, z=-1662.50], ok['Painting'/170111, l='MpServer', x=615.06, y=65.50, z=-1663.00], ok['Painting'/170119, l='MpServer', x=618.50, y=65.50, z=-1664.94], ok['Painting'/170120, l='MpServer', x=615.50, y=65.50, z=-1664.94], ok['Painting'/170108, l='MpServer', x=619.94, y=64.50, z=-1662.50], te['Creeper'/170228, l='MpServer', x=674.03, y=71.00, z=-1512.66], ok['Painting'/170109, l='MpServer', x=618.94, y=65.50, z=-1663.50], ts['Spider'/170231, l='MpServer', x=673.50, y=70.00, z=-1526.50], ok['Painting'/170110, l='MpServer', x=618.94, y=65.50, z=-1662.50], ts['Spider'/170230, l='MpServer', x=673.72, y=70.00, z=-1521.00], ok['Painting'/170111, l='MpServer', x=615.06, y=65.50, z=-1663.00], ok['Painting'/170104, l='MpServer', x=618.50, y=65.50, z=-1661.06], ok['Painting'/170105, l='MpServer', x=617.50, y=65.50, z=-1661.06], ok['Painting'/170106, l='MpServer', x=615.50, y=65.50, z=-1661.06], ok['Painting'/170107, l='MpServer', x=616.50, y=65.50, z=-1661.06], ok['Painting'/170100, l='MpServer', x=619.50, y=63.50, z=-1661.06], ok['Painting'/170101, l='MpServer', x=616.00, y=63.50, z=-1661.06], ok['Painting'/170102, l='MpServer', x=617.50, y=63.50, z=-1661.06], ok['Painting'/170103, l='MpServer', x=619.50, y=64.50, z=-1661.06], rq['Cow'/170096, l='MpServer', x=636.19, y=64.00, z=-1659.00], te['Creeper'/170232, l='MpServer', x=648.50, y=30.00, z=-1557.50], rr['Horse'/170098, l='MpServer', x=635.22, y=65.00, z=-1645.00], rx['Pig'/170099, l='MpServer', x=578.69, y=66.00, z=-1615.34], ry['Sheep'/170093, l='MpServer', x=716.38, y=72.00, z=-1556.53], rx['Pig'/170092, l='MpServer', x=626.97, y=64.00, z=-1636.09], rp['Chicken'/170095, l='MpServer', x=610.91, y=64.00, z=-1644.13], ry['Sheep'/170094, l='MpServer', x=576.47, y=68.00, z=-1548.41], ry['Sheep'/170089, l='MpServer', x=592.38, y=65.00, z=-1612.16], rr['Horse'/170088, l='MpServer', x=637.69, y=67.00, z=-1617.69], tv['Zombie'/170210, l='MpServer', x=625.01, y=61.00, z=-1589.03], rp['Chicken'/170091, l='MpServer', x=585.00, y=66.00, z=-1569.09], ry['Sheep'/170090, l='MpServer', x=680.19, y=64.00, z=-1630.31], rq['Cow'/170085, l='MpServer', x=690.78, y=71.00, z=-1543.28], rp['Chicken'/170084, l='MpServer', x=668.56, y=67.00, z=-1613.41], rp['Chicken'/170087, l='MpServer', x=598.44, y=70.00, z=-1552.53], tf['Enderman'/170223, l='MpServer', x=671.13, y=68.00, z=-1554.03], rr['Horse'/170086, l='MpServer', x=640.06, y=67.00, z=-1620.22], rx['Pig'/170083, l='MpServer', x=652.25, y=67.00, z=-1558.56]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at bda.a(SourceFile:284)
at ats.k(SourceFile:1393)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bdf['DragonGam3r'/170081, l='MpServer', x=642.94, y=64.62, z=-1580.95]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (999807,48,416), Chunk: (at 15,3,0 in 62487,26; contains blocks 999792,0,416 to 999807,255,431), Region: (1952,0; contains chunks 62464,0 to 62495,31, blocks 999424,0,0 to 999935,255,511)
Level time: 224582074 game time, 1940440446 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: 63 total; [bdf['DragonGam3r'/170081, l='MpServer', x=642.94, y=64.62, z=-1580.95], ok['Painting'/170101, l='MpServer', x=616.00, y=63.50, z=-1661.06], rr['Horse'/170114, l='MpServer', x=597.39, y=64.06, z=-1651.72], ok['Painting'/170100, l='MpServer', x=619.50, y=63.50, z=-1661.06], tf['Enderman'/170112, l='MpServer', x=576.66, y=36.00, z=-1516.75], ry['Sheep'/170113, l='MpServer', x=587.34, y=66.00, z=-1642.53], ok['Painting'/170118, l='MpServer', x=619.50, y=64.50, z=-1664.94], ok['Painting'/170119, l='MpServer', x=618.50, y=65.50, z=-1664.94], ok['Painting'/170116, l='MpServer', x=619.50, y=63.50, z=-1664.94], rn['Bat'/170271, l='MpServer', x=658.43, y=17.24, z=-1527.59], ok['Painting'/170117, l='MpServer', x=618.50, y=64.00, z=-1664.94], ok['Painting'/170109, l='MpServer', x=618.94, y=65.50, z=-1663.50], rp['Chicken'/170123, l='MpServer', x=577.44, y=64.00, z=-1659.53], ok['Painting'/170108, l='MpServer', x=619.94, y=64.50, z=-1662.50], ok['Painting'/170120, l='MpServer', x=615.50, y=65.50, z=-1664.94], ok['Painting'/170107, l='MpServer', x=616.50, y=65.50, z=-1661.06], rp['Chicken'/170121, l='MpServer', x=573.38, y=68.00, z=-1639.53], ok['Painting'/170106, l='MpServer', x=615.50, y=65.50, z=-1661.06], ok['Painting'/170105, l='MpServer', x=617.50, y=65.50, z=-1661.06], ok['Painting'/170104, l='MpServer', x=618.50, y=65.50, z=-1661.06], ok['Painting'/170103, l='MpServer', x=619.50, y=64.50, z=-1661.06], ok['Painting'/170102, l='MpServer', x=617.50, y=63.50, z=-1661.06], ok['Painting'/170116, l='MpServer', x=619.50, y=63.50, z=-1664.94], ok['Painting'/170117, l='MpServer', x=618.50, y=64.00, z=-1664.94], ok['Painting'/170118, l='MpServer', x=619.50, y=64.50, z=-1664.94], ok['Painting'/170110, l='MpServer', x=618.94, y=65.50, z=-1662.50], ok['Painting'/170111, l='MpServer', x=615.06, y=65.50, z=-1663.00], ok['Painting'/170119, l='MpServer', x=618.50, y=65.50, z=-1664.94], ok['Painting'/170120, l='MpServer', x=615.50, y=65.50, z=-1664.94], ok['Painting'/170108, l='MpServer', x=619.94, y=64.50, z=-1662.50], te['Creeper'/170228, l='MpServer', x=674.03, y=71.00, z=-1512.66], ok['Painting'/170109, l='MpServer', x=618.94, y=65.50, z=-1663.50], ts['Spider'/170231, l='MpServer', x=673.50, y=70.00, z=-1526.50], ok['Painting'/170110, l='MpServer', x=618.94, y=65.50, z=-1662.50], ts['Spider'/170230, l='MpServer', x=673.72, y=70.00, z=-1521.00], ok['Painting'/170111, l='MpServer', x=615.06, y=65.50, z=-1663.00], ok['Painting'/170104, l='MpServer', x=618.50, y=65.50, z=-1661.06], ok['Painting'/170105, l='MpServer', x=617.50, y=65.50, z=-1661.06], ok['Painting'/170106, l='MpServer', x=615.50, y=65.50, z=-1661.06], ok['Painting'/170107, l='MpServer', x=616.50, y=65.50, z=-1661.06], ok['Painting'/170100, l='MpServer', x=619.50, y=63.50, z=-1661.06], ok['Painting'/170101, l='MpServer', x=616.00, y=63.50, z=-1661.06], ok['Painting'/170102, l='MpServer', x=617.50, y=63.50, z=-1661.06], ok['Painting'/170103, l='MpServer', x=619.50, y=64.50, z=-1661.06], rq['Cow'/170096, l='MpServer', x=636.19, y=64.00, z=-1659.00], te['Creeper'/170232, l='MpServer', x=648.50, y=30.00, z=-1557.50], rr['Horse'/170098, l='MpServer', x=635.22, y=65.00, z=-1645.00], rx['Pig'/170099, l='MpServer', x=578.69, y=66.00, z=-1615.34], ry['Sheep'/170093, l='MpServer', x=716.38, y=72.00, z=-1556.53], rx['Pig'/170092, l='MpServer', x=626.97, y=64.00, z=-1636.09], rp['Chicken'/170095, l='MpServer', x=610.91, y=64.00, z=-1644.13], ry['Sheep'/170094, l='MpServer', x=576.47, y=68.00, z=-1548.41], ry['Sheep'/170089, l='MpServer', x=592.38, y=65.00, z=-1612.16], rr['Horse'/170088, l='MpServer', x=637.69, y=67.00, z=-1617.69], tv['Zombie'/170210, l='MpServer', x=625.01, y=61.00, z=-1589.03], rp['Chicken'/170091, l='MpServer', x=585.00, y=66.00, z=-1569.09], ry['Sheep'/170090, l='MpServer', x=680.19, y=64.00, z=-1630.31], rq['Cow'/170085, l='MpServer', x=690.78, y=71.00, z=-1543.28], rp['Chicken'/170084, l='MpServer', x=668.56, y=67.00, z=-1613.41], rp['Chicken'/170087, l='MpServer', x=598.44, y=70.00, z=-1552.53], tf['Enderman'/170223, l='MpServer', x=671.13, y=68.00, z=-1554.03], rr['Horse'/170086, l='MpServer', x=640.06, y=67.00, z=-1620.22], rx['Pig'/170083, l='MpServer', x=652.25, y=67.00, z=-1558.56]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server

– System Details –
Details:
Minecraft Version: 1.6.2
Operating System: Mac OS X (x86_64) version 10.8.4
Java Version: 1.6.0_51, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 163469440 bytes (155 MB) / 605097984 bytes (577 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 14931 (836136 bytes; 0 MB) allocated, 441 (24696 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: NVIDIA GeForce GT 640M OpenGL Engine GL version 2.1 NVIDIA-8.12.47 310.40.00.05f01, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Pack: Sphax PureBDcraft 128x MC16
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1884 (105504 bytes; 0 MB) allocated, 76 (4256 bytes; 0 MB) used