Hopper: java.lang.NullPointerException: Ticking screen

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-1427855/

Crash:

java.lang.NullPointerException: Ticking screen
	at ek.a(SourceFile:266)
	at eg.h(SourceFile:148)
	at eg.a(SourceFile:154)
	at bkq.a(SourceFile:245)
	at bgz.c(SourceFile:108)

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

---- Minecraft Crash Report ----
// Don't do that.

Time: 26.02.14 14:58
Description: Ticking screen

java.lang.NullPointerException: Ticking screen
	at ek.a(SourceFile:266)
	at eg.h(SourceFile:148)
	at eg.a(SourceFile:154)
	at bkq.a(SourceFile:245)
	at bgz.c(SourceFile:108)
	at azl.p(SourceFile:1318)
	at azl.ah(SourceFile:757)
	at azl.f(SourceFile:711)
	at net.minecraft.client.main.Main.main(SourceFile:148)


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

-- Head --
Stacktrace:
	at ek.a(SourceFile:266)
	at eg.h(SourceFile:148)
	at eg.a(SourceFile:154)
	at bkq.a(SourceFile:245)
	at bgz.c(SourceFile:108)

-- Affected screen --
Details:
	Screen name: bgz
Stacktrace:
	at azl.p(SourceFile:1318)
	at azl.ah(SourceFile:757)
	at azl.f(SourceFile:711)
	at net.minecraft.client.main.Main.main(SourceFile:148)

-- System Details --
Details:
	Minecraft Version: 1.7.5
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_21, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 28364352 bytes (27 MB) / 71233536 bytes (67 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	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: 1.7.5
	LWJGL: 2.9.1
	OpenGL: GeForce GTX 550 Ti/PCIe/SSE2 GL version 4.4.0, NVIDIA Corporation
	GL Caps: Using GL 1.3 multitexturing.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Русский (Россия)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-1427855/66964121/