I crashed

Put the summary of the bug you're having here

What I expected to happen was...: I wouldn't crash.
Describe what you thought should happen here
I thought I wouldn't crash when I said Hi or something.
What actually happened was...: I crashed
Describe what happened here
I was in a multiplayer server and then as I tried to say something like, "Hello." I crashed.

Steps to Reproduce:
1. First I will try and keep talking, and see if that'll solve it.
2. ...Next I'm gonna try and use signs in survival.
3. ...Last I'm gonna keep trying this until it might work.

Here is my last crash report here:

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 7/9/13 8:00 AM
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: 2 total; [bdf['Jennifer765'/22223739, l='MpServer', x=0.52, y=74.62, z=-6.93], bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19]]
	Chunk stats: MultiplayerChunkCache: 81
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,80,0), Chunk: (at 0,5,0 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: 14495710 game time, 14519747 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: 23 total; [bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19], bdf['Jennifer765'/22223739, l='MpServer', x=0.52, y=74.62, z=-6.93], bev['benny2998'/20816662, l='MpServer', x=555.06, y=81.00, z=-322.03], bev['Otsolainen'/21465483, l='MpServer', x=555.59, y=81.00, z=-310.38], bev['mycandypony'/18073226, l='MpServer', x=559.50, y=81.00, z=-317.56], bev['Pouter42'/21680292, l='MpServer', x=553.56, y=81.00, z=-317.53], bev['MadManoloz'/21576332, l='MpServer', x=558.22, y=81.02, z=-325.69], bev['ericky444'/20232811, l='MpServer', x=556.75, y=81.00, z=-323.59], bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19], bev['benny2998'/20816662, l='MpServer', x=549.81, y=81.00, z=-318.31], bev['mycandypony'/18073226, l='MpServer', x=559.63, y=81.00, z=-318.06], bev['ericky444'/20232811, l='MpServer', x=555.50, y=81.00, z=-312.06], bev['Rick3440'/22186021, l='MpServer', x=0.08, y=74.07, z=-27.19], bev['JRrobertson'/22225672, l='MpServer', x=0.31, y=72.50, z=-27.88], bev['benny2998'/20816662, l='MpServer', x=555.50, y=81.00, z=-310.38], bev['Otsolainen'/21465483, l='MpServer', x=558.59, y=81.09, z=-321.75], bev['MadManoloz'/21576332, l='MpServer', x=553.69, y=81.00, z=-310.75], bev['DonkyTalk'/22215880, l='MpServer', x=555.57, y=81.00, z=-323.58], bev['mycandypony'/18073226, l='MpServer', x=555.47, y=81.00, z=-310.28], bev['MadManoloz'/21576332, l='MpServer', x=555.66, y=81.00, z=-318.78], bev['Rick3440'/22186021, l='MpServer', x=551.28, y=81.00, z=-321.84], bev['JRrobertson'/22225672, l='MpServer', x=550.70, y=81.88, z=-325.95], bev['professional99'/22119623, l='MpServer', x=1.06, y=74.00, z=1.31]]
	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: 2 total; [bdf['Jennifer765'/22223739, l='MpServer', x=0.52, y=74.62, z=-6.93], bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19]]
	Chunk stats: MultiplayerChunkCache: 81
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,80,0), Chunk: (at 0,5,0 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: 14495710 game time, 14519747 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: 23 total; [bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19], bdf['Jennifer765'/22223739, l='MpServer', x=0.52, y=74.62, z=-6.93], bev['benny2998'/20816662, l='MpServer', x=555.06, y=81.00, z=-322.03], bev['Otsolainen'/21465483, l='MpServer', x=555.59, y=81.00, z=-310.38], bev['mycandypony'/18073226, l='MpServer', x=559.50, y=81.00, z=-317.56], bev['Pouter42'/21680292, l='MpServer', x=553.56, y=81.00, z=-317.53], bev['MadManoloz'/21576332, l='MpServer', x=558.22, y=81.02, z=-325.69], bev['ericky444'/20232811, l='MpServer', x=556.75, y=81.00, z=-323.59], bev['Awesome33445566'/21907302, l='MpServer', x=1.56, y=73.00, z=-3.19], bev['benny2998'/20816662, l='MpServer', x=549.81, y=81.00, z=-318.31], bev['mycandypony'/18073226, l='MpServer', x=559.63, y=81.00, z=-318.06], bev['ericky444'/20232811, l='MpServer', x=555.50, y=81.00, z=-312.06], bev['Rick3440'/22186021, l='MpServer', x=0.08, y=74.07, z=-27.19], bev['JRrobertson'/22225672, l='MpServer', x=0.31, y=72.50, z=-27.88], bev['benny2998'/20816662, l='MpServer', x=555.50, y=81.00, z=-310.38], bev['Otsolainen'/21465483, l='MpServer', x=558.59, y=81.09, z=-321.75], bev['MadManoloz'/21576332, l='MpServer', x=553.69, y=81.00, z=-310.75], bev['DonkyTalk'/22215880, l='MpServer', x=555.57, y=81.00, z=-323.58], bev['mycandypony'/18073226, l='MpServer', x=555.47, y=81.00, z=-310.28], bev['MadManoloz'/21576332, l='MpServer', x=555.66, y=81.00, z=-318.78], bev['Rick3440'/22186021, l='MpServer', x=551.28, y=81.00, z=-321.84], bev['JRrobertson'/22225672, l='MpServer', x=550.70, y=81.88, z=-325.95], bev['professional99'/22119623, l='MpServer', x=1.06, y=74.00, z=1.31]]
	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_45, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 61091128 bytes (58 MB) / 121303040 bytes (115 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 8910 (498960 bytes; 0 MB) allocated, 18 (1008 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: Intel HD Graphics 4000 OpenGL Engine GL version 2.1 INTEL-8.12.47, Intel 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: 67 (3752 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used