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I don´t know why, but since i try to connect to multiplayer option, Minecraft crash.

All versions that I´d try, it crashes:

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 20/05/16 03:27 PM
Description: Rendering screen

java.lang.IllegalArgumentException: bad Base64 input character at 4032: 0 (decimal)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at bzs.c(SourceFile:212)
at bzs.a(SourceFile:145)
at buu.a(SourceFile:25)
at bvk.b(SourceFile:409)
at bvk.a(SourceFile:217)
at bzp.a(SourceFile:291)
at cji.b(EntityRenderer.java:1302)
at bsu.as(SourceFile:903)
at bsu.a(SourceFile:314)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
at io.netty.handler.codec.base64.Base64.decode(Base64.java:247)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:197)
at io.netty.handler.codec.base64.Base64.decode(Base64.java:188)
at bzs.c(SourceFile:212)
at bzs.a(SourceFile:145)
at buu.a(SourceFile:25)
at bvk.b(SourceFile:409)
at bvk.a(SourceFile:217)
at bzp.a(SourceFile:291)

-- Screen render details --
Details:
Screen name: bzp
Mouse location: Scaled: (358, 172). Absolute: (716, 361)
Screen size: Scaled: (683, 353). Absolute: (1366, 705). Scale factor of 2
Stacktrace:
at cji.b(EntityRenderer.java:1302)
at bsu.as(SourceFile:903)
at bsu.a(SourceFile:314)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
at net.minecraft.launchwrapper.Launch.main(Launch.java:27)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 141330304 bytes (134 MB) / 259497984 bytes (247 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.8-OptiFine_HD_U_D3
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 5500 GL version 4.3.0 - Build 10.18.14.4112, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Resource Packs: [faithful32pack.zip] Current Language: Espa?ol (M?xico)
Profiler Position: N/A (disabled)