Multiplayer Chat problems

Well when im playing multiplayer or single player when i try to type a command or chat the game crashes.

This is the file report :

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 7/8/13 3:20 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: 3 total; [bdf['_kiwipoop_'/7485, l='MpServer', x=197.50, y=6.62, z=255.84], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53]]
	Chunk stats: MultiplayerChunkCache: 169
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-143,65,21), Chunk: (at 1,4,5 in -9,1; contains blocks -144,0,16 to -129,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 347266896 game time, 347553271 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: 5 total; [bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bdf['_kiwipoop_'/7485, l='MpServer', x=197.50, y=6.62, z=255.84], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53]]
	Retry entities: 0 total; []
	Server brand:  > B u n g e e C o r d   ( g i t - B u n g e e C o r d - P r o x y - 1 . 6 . 1 - S N A P S H O T - " 9 a d c b 0 5 " - 5 8 7 )
	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: 3 total; [bdf['_kiwipoop_'/7485, l='MpServer', x=197.50, y=6.62, z=255.84], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53]]
	Chunk stats: MultiplayerChunkCache: 169
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-143,65,21), Chunk: (at 1,4,5 in -9,1; contains blocks -144,0,16 to -129,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 347266896 game time, 347553271 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: 5 total; [bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bdf['_kiwipoop_'/7485, l='MpServer', x=197.50, y=6.62, z=255.84], bev['philrino'/65897581, l='MpServer', x=193.71, y=5.00, z=273.28], bev['chaseywayz'/65626937, l='MpServer', x=199.44, y=5.00, z=286.53]]
	Retry entities: 0 total; []
	Server brand:  > B u n g e e C o r d   ( g i t - B u n g e e C o r d - P r o x y - 1 . 6 . 1 - S N A P S H O T - " 9 a d c b 0 5 " - 5 8 7 )
	Server type: Non-integrated multiplayer server

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 38035760 bytes (36 MB) / 100114432 bytes (95 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 1826 (102256 bytes; 0 MB) allocated, 23 (1288 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6300 series Graphics GL version 4.2.11764 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Ovos Rustic Redemption v3.2.2 (for 1.5.1).zip
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 278 (15568 bytes; 0 MB) allocated, 21 (1176 bytes; 0 MB) used