Hopper: java.lang.IllegalArgumentException: MALFORMED

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-449196/

Crash:

java.lang.IllegalArgumentException: MALFORMED
	at java.util.zip.ZipCoder.toString(Unknown Source)
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bqg.c(SourceFile:69)
	at bqv.a(SourceFile:34)
	at bqv.a(SourceFile:89)
	at azc.b(SourceFile:488)
	at azc.Z(SourceFile:392)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 24.10.13 16:16
Description: Initializing game

java.lang.IllegalArgumentException: MALFORMED
	at java.util.zip.ZipCoder.toString(Unknown Source)
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bqg.c(SourceFile:69)
	at bqv.a(SourceFile:34)
	at bqv.a(SourceFile:89)
	at azc.b(SourceFile:488)
	at azc.Z(SourceFile:392)
	at azc.e(SourceFile:689)
	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 java.util.zip.ZipCoder.toString(Unknown Source)
	at java.util.zip.ZipFile.getZipEntry(Unknown Source)
	at java.util.zip.ZipFile.access$900(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at java.util.zip.ZipFile$1.nextElement(Unknown Source)
	at bqg.c(SourceFile:69)
	at bqv.a(SourceFile:34)
	at bqv.a(SourceFile:89)
	at azc.b(SourceFile:488)
	at azc.Z(SourceFile:392)

-- Initialization --
Details:
Stacktrace:
	at azc.e(SourceFile:689)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 1.7.1
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_40, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 76852656 bytes (73 MB) / 121110528 bytes (115 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.7.1
	LWJGL: 2.9.0
	OpenGL: ATI Radeon HD 5450 GL version 4.2.12217 Compatibility Profile Context 12.104.0.0, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [BBT.zip]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-449196/21072087/