What I expected to happen was...:
My message should be put into chat where everyone can read it.
What actually happened was...:
My game crashes
Steps to Reproduce:
1. Type into chat bar
2. Press enter
3. ...

Here's the report if that helps. Thanks!

---- Minecraft Crash Report ----
// My bad.

Time: 7/9/13 10:38 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['smedlin'/1229398, l='MpServer', x=-339.76, y=64.62, z=-397.54], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41]]
Chunk stats: MultiplayerChunkCache: 169
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (1547,239,1267), Chunk: (at 11,14,3 in 96,79; contains blocks 1536,0,1264 to 1551,255,1279), Region: (3,2; contains chunks 96,64 to 127,95, blocks 1536,0,1024 to 2047,255,1535)
Level time: 892620621 game time, 893038681 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 30 total; [bdf['smedlin'/1229398, l='MpServer', x=-339.76, y=64.62, z=-397.54], oc['entity.ItemFrame.name'/1115068, l='MpServer', x=-348.06, y=64.50, z=-368.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1115069, l='MpServer', x=-346.94, y=64.50, z=-368.50], oc['entity.ItemFrame.name'/1115066, l='MpServer', x=-346.94, y=64.50, z=-426.50], oc['entity.ItemFrame.name'/1115067, l='MpServer', x=-340.94, y=64.50, z=-368.50], oc['entity.ItemFrame.name'/1114918, l='MpServer', x=-320.06, y=64.50, z=-412.50], oc['entity.ItemFrame.name'/1114919, l='MpServer', x=-320.06, y=64.50, z=-405.50], oc['entity.ItemFrame.name'/1114916, l='MpServer', x=-320.06, y=64.50, z=-409.50], oc['entity.ItemFrame.name'/1114917, l='MpServer', x=-320.06, y=64.50, z=-412.50], oc['entity.ItemFrame.name'/1114915, l='MpServer', x=-335.94, y=64.50, z=-412.50], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41], oc['entity.ItemFrame.name'/1114924, l='MpServer', x=-320.06, y=64.50, z=-402.50], oc['entity.ItemFrame.name'/1114922, l='MpServer', x=-320.06, y=64.50, z=-406.50], oc['entity.ItemFrame.name'/1114748, l='MpServer', x=-318.94, y=64.50, z=-367.50], oc['entity.ItemFrame.name'/1114923, l='MpServer', x=-320.06, y=64.50, z=-403.50], oc['entity.ItemFrame.name'/1114920, l='MpServer', x=-320.06, y=64.50, z=-411.50], oc['entity.ItemFrame.name'/1114921, l='MpServer', x=-320.06, y=64.50, z=-408.50], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41], oc['entity.ItemFrame.name'/1114755, l='MpServer', x=-318.94, y=64.50, z=-429.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1114752, l='MpServer', x=-318.94, y=64.50, z=-400.50], oc['entity.ItemFrame.name'/1115080, l='MpServer', x=-348.06, y=64.50, z=-367.50], ok['Painting'/1112920, l='MpServer', x=-300.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1115082, l='MpServer', x=-346.94, y=64.50, z=-367.50], oc['entity.ItemFrame.name'/1115074, l='MpServer', x=-340.94, y=64.50, z=-367.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], ok['Painting'/1114753, l='MpServer', x=-305.50, y=64.50, z=-426.06], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41]]
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: 3 total; [bdf['smedlin'/1229398, l='MpServer', x=-339.76, y=64.62, z=-397.54], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41]]
Chunk stats: MultiplayerChunkCache: 169
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (1547,239,1267), Chunk: (at 11,14,3 in 96,79; contains blocks 1536,0,1264 to 1551,255,1279), Region: (3,2; contains chunks 96,64 to 127,95, blocks 1536,0,1024 to 2047,255,1535)
Level time: 892620621 game time, 893038681 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 30 total; [bdf['smedlin'/1229398, l='MpServer', x=-339.76, y=64.62, z=-397.54], oc['entity.ItemFrame.name'/1115068, l='MpServer', x=-348.06, y=64.50, z=-368.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1115069, l='MpServer', x=-346.94, y=64.50, z=-368.50], oc['entity.ItemFrame.name'/1115066, l='MpServer', x=-346.94, y=64.50, z=-426.50], oc['entity.ItemFrame.name'/1115067, l='MpServer', x=-340.94, y=64.50, z=-368.50], oc['entity.ItemFrame.name'/1114918, l='MpServer', x=-320.06, y=64.50, z=-412.50], oc['entity.ItemFrame.name'/1114919, l='MpServer', x=-320.06, y=64.50, z=-405.50], oc['entity.ItemFrame.name'/1114916, l='MpServer', x=-320.06, y=64.50, z=-409.50], oc['entity.ItemFrame.name'/1114917, l='MpServer', x=-320.06, y=64.50, z=-412.50], oc['entity.ItemFrame.name'/1114915, l='MpServer', x=-335.94, y=64.50, z=-412.50], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41], oc['entity.ItemFrame.name'/1114924, l='MpServer', x=-320.06, y=64.50, z=-402.50], oc['entity.ItemFrame.name'/1114922, l='MpServer', x=-320.06, y=64.50, z=-406.50], oc['entity.ItemFrame.name'/1114748, l='MpServer', x=-318.94, y=64.50, z=-367.50], oc['entity.ItemFrame.name'/1114923, l='MpServer', x=-320.06, y=64.50, z=-403.50], oc['entity.ItemFrame.name'/1114920, l='MpServer', x=-320.06, y=64.50, z=-411.50], oc['entity.ItemFrame.name'/1114921, l='MpServer', x=-320.06, y=64.50, z=-408.50], bev['§6trravis'/1100578, l='MpServer', x=-308.44, y=63.00, z=-353.41], oc['entity.ItemFrame.name'/1114755, l='MpServer', x=-318.94, y=64.50, z=-429.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1114752, l='MpServer', x=-318.94, y=64.50, z=-400.50], oc['entity.ItemFrame.name'/1115080, l='MpServer', x=-348.06, y=64.50, z=-367.50], ok['Painting'/1112920, l='MpServer', x=-300.50, y=64.50, z=-426.06], oc['entity.ItemFrame.name'/1115082, l='MpServer', x=-346.94, y=64.50, z=-367.50], oc['entity.ItemFrame.name'/1115074, l='MpServer', x=-340.94, y=64.50, z=-367.50], ok['Painting'/1114754, l='MpServer', x=-308.50, y=64.50, z=-426.06], ok['Painting'/1114753, l='MpServer', x=-305.50, y=64.50, z=-426.06], bev['§7Tony09050'/36632, l='MpServer', x=-299.69, y=63.00, z=-400.41]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server

– System Details –
Details:
Minecraft Version: 1.6.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.6.0_17, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 235681176 bytes (224 MB) / 308215808 bytes (293 MB) up to 954466304 bytes (910 MB)
JVM Flags: 1 total; -Xmx1G
AABB Pool Size: 9255 (518280 bytes; 0 MB) allocated, 25 (1400 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: GeForce GTX 260/PCI/SSE2 GL version 3.2.0, NVIDIA Corporation
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: 654 (36624 bytes; 0 MB) allocated, 27 (1512 bytes; 0 MB) used