Plantage sur Minecraft !

Bonjour,
Aujourd'hui, Minecraft plante sans aucune raison. Je suis en 1.2.5, ça marchais très bien jusqu'aujourd'hui. J'ai un message d'erreur :

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

Minecraft has stopped running because it encountered a problem.




--- BEGIN ERROR REPORT 7cf3a456 --------
Generated 01/05/12 18:22

Minecraft: Minecraft 1.2.5
OS: Windows 7 (x86) version 6.1
Java: 1.7.0_02, Oracle Corporation
VM: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
LWJGL: 2.4.2
OpenGL: null version null, null

java.lang.IllegalStateException: glGetString(GL_VERSION) returned null - possibly caused by missing current context.
at org.lwjgl.opengl.GLContext.getSupportedExtensions(GLContext.java:187)
at org.lwjgl.opengl.ContextCapabilities.initAllStubs(ContextCapabilities.java:4355)
at org.lwjgl.opengl.ContextCapabilities.<init>(ContextCapabilities.java:4661)
at org.lwjgl.opengl.GLContext.useContext(GLContext.java:352)
at org.lwjgl.opengl.Context.makeCurrent(Context.java:183)
at org.lwjgl.opengl.Display.makeCurrent(Display.java:730)
at org.lwjgl.opengl.Display.makeCurrentAndSetSwapInterval(Display.java:896)
at org.lwjgl.opengl.Display.create(Display.java:860)
at org.lwjgl.opengl.Display.create(Display.java:784)
at net.minecraft.client.Minecraft.a(SourceFile:204)
at net.minecraft.client.Minecraft.run(SourceFile:657)
at java.lang.Thread.run(Thread.java:722)
--- END ERROR REPORT 6ecb09f ----------

Je précise que je joue en version prenium.