Minecraft Server issue (chat related)

I was going to play some CTF on a server. It was a 1.6.1 server. I got some communication errors on a lot of other server, but I ignored it. Nothing seemed wrong at first, everything seemed fine. Then I sent out a message into the chat. My Minecraft crashed. It didn't seem to affect others, though, since there were lots of messages already in the chat. This problem occured multiple times, even after restarting the entire Minecraft system. This could be really bad if it keeps on happening.

-- 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 bcn.a(SourceFile:518)
	at dl.a(SourceFile:49)
	at cn.b(SourceFile:350)
	at bcn.d(SourceFile:95)

-- Affected level --
Details:
	Level name: MpServer
	All players: 13 total; [bcx['Bcoolcsu'/3837543, l='MpServer', x=-255,50, y=19,62, z=176,50], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50]]
	Chunk stats: MultiplayerChunkCache: 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-256,18,176), Chunk: (at 0,1,0 in -16,11; contains blocks -256,0,176 to -241,255,191), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 129243870 game time, 133627906 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: 31 total; [bcx['Bcoolcsu'/3837543, l='MpServer', x=-255,50, y=19,62, z=176,50], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kingmasong'/3837175, l='MpServer', x=-243,28, y=5,97, z=180,72], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['zenon5123'/3837354, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['Odins_Children'/3836886, l='MpServer', x=-261,16, y=19,50, z=188,16], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['mariobros03'/3837023, l='MpServer', x=-257,13, y=21,00, z=162,13], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['TB_da_boss'/3837097, l='MpServer', x=-268,81, y=8,14, z=174,78], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['surfswagger'/3836868, l='MpServer', x=-255,17, y=23,41, z=226,65], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50]]
	Retry entities: 0 total; []
Stacktrace:
	at bcu.a(SourceFile:284)
	at atn.k(SourceFile:1387)
	at atn.S(SourceFile:662)
	at atn.d(SourceFile:618)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- Affected level --
Details:
	Level name: MpServer
	All players: 13 total; [bcx['Bcoolcsu'/3837543, l='MpServer', x=-255,50, y=19,62, z=176,50], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50]]
	Chunk stats: MultiplayerChunkCache: 225
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-256,18,176), Chunk: (at 0,1,0 in -16,11; contains blocks -256,0,176 to -241,255,191), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 129243870 game time, 133627906 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: 31 total; [bcx['Bcoolcsu'/3837543, l='MpServer', x=-255,50, y=19,62, z=176,50], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kingmasong'/3837175, l='MpServer', x=-243,28, y=5,97, z=180,72], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['grisoulle107'/3837276, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['zenon5123'/3837354, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['Odins_Children'/3836886, l='MpServer', x=-261,16, y=19,50, z=188,16], ben['Flamekill17'/3837473, l='MpServer', x=-255,50, y=18,00, z=176,50], ben['mariobros03'/3837023, l='MpServer', x=-257,13, y=21,00, z=162,13], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['TB_da_boss'/3837097, l='MpServer', x=-268,81, y=8,14, z=174,78], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['surfswagger'/3836868, l='MpServer', x=-255,17, y=23,41, z=226,65], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['petelrail'/3816081, l='MpServer', x=-255,66, y=20,47, z=223,44], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['Norwayblue'/3802585, l='MpServer', x=-254,06, y=18,00, z=183,44], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50], ben['snifflysugar'/3836907, l='MpServer', x=-254,00, y=18,00, z=176,56], ben['Anabel13'/3837022, l='MpServer', x=-255,56, y=18,24, z=199,29], ben['time_lord441'/3837629, l='MpServer', x=-255,50, y=18,03, z=176,50], ben['legotian77'/3836291, l='MpServer', x=-255,97, y=21,00, z=163,78], ben['Ryan50560'/3836764, l='MpServer', x=-260,81, y=18,00, z=169,56], ben['uggelblubb'/3837583, l='MpServer', x=-255,09, y=18,00, z=178,78], ben['webjman'/3837716, l='MpServer', x=-255,50, y=18,50, z=176,50], ben['kasper_741'/3833826, l='MpServer', x=-255,50, y=18,00, z=176,50]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_01, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 204071064 bytes (194 MB) / 364314624 bytes (347 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 7955 (445480 bytes; 0 MB) allocated, 58 (3248 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.1
	LWJGL: 2.9.0
	OpenGL: AMD RADEON HD 6450   GL version 4.1.10666 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: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 3320 (185920 bytes; 0 MB) allocated, 47 (2632 bytes; 0 MB) used