Hopper: java.lang.IllegalArgumentException: bad Base64 input character at 4036: 5 (Caused by corrupt servers.dat)

java.lang.IllegalArgumentException: bad Base64 input character at 4036: 5 (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 bge.b(SourceFile:155)
	at bge.a(SourceFile:130)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgb.a(SourceFile:283)

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 28/10/13 17:37
Description: Rendering screen

java.lang.IllegalArgumentException: bad Base64 input character at 4054: 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 bge.b(SourceFile:155)
	at bge.a(SourceFile:130)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgb.a(SourceFile:283)
	at bll.b(SourceFile:851)
	at azd.ad(SourceFile:780)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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 bge.b(SourceFile:155)
	at bge.a(SourceFile:130)
	at bat.a(SourceFile:26)
	at bay.b(SourceFile:382)
	at bay.a(SourceFile:259)
	at bgb.a(SourceFile:283)

-- Screen render details --
Details:
	Screen name: bgb
	Mouse location: Scaled: (243, 155). Absolute: (731, 432)
	Screen size: Scaled: (480, 300). Absolute: (1440, 900). Scale factor of 3
Stacktrace:
	at bll.b(SourceFile:851)
	at azd.ad(SourceFile:780)
	at azd.e(SourceFile:704)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.2
	Operating System: Windows 8 (x86) version 6.2
	Java Version: 1.7.0_45, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 346737512 bytes (330 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 1921 (107576 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 1.7.2
	LWJGL: 2.9.0
	OpenGL: GeForce 9200M GE/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)