Game crash after attempting to join a server that is not up. Also, how to report technical support issues?

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 1/11/13 10:59 AM
Description: Rendering screen

java.lang.NullPointerException
	at aul.b(SourceFile:168)
	at aul.e(SourceFile:164)
	at aym.a(SourceFile:51)
	at ban.b(SourceFile:774)
	at net.minecraft.client.Minecraft.J(SourceFile:605)
	at net.minecraft.client.Minecraft.run(SourceFile:534)
	at java.lang.Thread.run(Thread.java:680)


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

-- Head --
Stacktrace:
	at aul.b(SourceFile:168)
	at aul.e(SourceFile:164)
	at aym.a(SourceFile:51)

-- Screen render details --
Details:
	Screen name: aym
	Mouse location: Scaled: (120, 192). Absolute: (240, 95)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2
Stacktrace:
	at ban.b(SourceFile:774)
	at net.minecraft.client.Minecraft.J(SourceFile:605)
	at net.minecraft.client.Minecraft.run(SourceFile:534)
	at java.lang.Thread.run(Thread.java:680)

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Mac OS X (x86_64) version 10.7.5
	Java Version: 1.6.0_37, Apple Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
	Memory: 546037424 bytes (520 MB) / 581435392 bytes (554 MB) up to 1065025536 bytes (1015 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	LWJGL: 2.4.2
	OpenGL: ATI Radeon HD 5750 OpenGL Engine GL version 2.1 ATI-7.32.12, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: ~~ERROR~~ NullPointerException: null