I just registered an account and clicked the Minecraft Classic: Single Player option, but, after allowing access and after it loads a bit, I get a windows box saying;
     
      "Failed to start Minecraft
         org.lwjgl.LWJGLException: Pixel format not accelerated."

Does anyone know what this is...? Or how I can fix it? It did alert me that Minecraft used an earlier version of Java than I had, so, that might mean something...