i can't play mine craft because i get this any time i try to play.

Minecraft has crashed!


----------------------




Minecraft has stopped running because it encountered a problem.










--- BEGIN ERROR REPORT 7cf3a456 --------


Generated 3/25/12 1:04 PM




Minecraft: Minecraft 1.2.4


OS: Mac OS X (i386) version 10.7.3


Java: 1.6.0_29, Apple Inc.


VM: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.


LWJGL: 2.4.2


OpenGL: NVIDIA GeForce 320M OpenGL Engine version 2.1 NVIDIA-7.18.11, NVIDIA Corporation




java.lang.NullPointerException


at java.io.Reader.<init>(Reader.java:61)


at java.io.InputStreamReader.<init>(InputStreamReader.java:80)


at adn.a(SourceFile:62)


at adn.a(SourceFile:99)


at net.minecraft.client.Minecraft.a(SourceFile:256)


at net.minecraft.client.Minecraft.run(SourceFile:650)


at java.lang.Thread.run(Thread.java:680)


--- END ERROR REPORT 19bb58f7 ----------




Im on MAC OSx lion CAN SOMEONE HELP ME