I have a mac I got for christmas, last night I was out exploring the nether gathering building materials to bring back to the surface for my castle when the game crashed and I got this message.

Minecraft has crashed!     
      ----------------------     

Minecraft has stopped running because it encountered a problem.

If you wish to report this, please copy this entire text and email it to

.
Please include a description of what you did when the error occured.

--- BEGIN ERROR REPORT a1dce528 --------
Generated 1/14/11 9:25 PM

Minecraft: Minecraft Beta 1.2
OS: Mac OS X (i386) version 10.6.4
Java: 1.6.0_20, Apple Inc.
VM: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.
LWJGL: 2.4.2
[failed to get system properties (java.lang.NullPointerException)]

java.lang.NullPointerException
    at org.lwjgl.opengl.Display.makeCurrent(Display.java:730)
    at org.lwjgl.opengl.Display.makeCurrentAndSetSwapInterval(Display.java:896)
    at org.lwjgl.opengl.Display.setParent(Display.java:478)
    at net.minecraft.client.Minecraft.a(SourceFile:232)
    at net.minecraft.client.Minecraft.run(SourceFile:642)
    at java.lang.Thread.run(Thread.java:637)
--- END ERROR REPORT fb0461c7 ----------

I'm now completely locked out of the game, and I can't play in the browser version because of this, and the downloaded version is way to choppy and laggy to be desirable. Is minecraft naturally this unstable on Macs?