Ive just run the TestJMEDesktop and i got this error.
Aug 10, 2008 7:28:45 PM com.jmex.awt.swingui.LWJGLImageGraphics update
WARNING: Error updating dirty region: java.awt.Rectangle[x=0,y=0,width=500,height=400] - falling back to updating whole image!
Aug 10, 2008 7:28:45 PM class jmetest.awt.swingui.HelloJMEDesktop start()
SEVERE: Exception in game loop
org.lwjgl.opengl.OpenGLException: Invalid operation (1282)
at org.lwjgl.opengl.Util.checkGLError(Util.java:54)
at com.jmex.awt.swingui.LWJGLImageGraphics.update(LWJGLImageGraphics.java:133)
at com.jmex.awt.swingui.LWJGLImageGraphics.update(LWJGLImageGraphics.java:148)
at com.jmex.awt.swingui.ImageGraphics.update(ImageGraphics.java:97)
at com.jmex.awt.swingui.JMEDesktop.draw(JMEDesktop.java:1096)
at com.jme.scene.Spatial.onDraw(Spatial.java:410)
at com.jme.scene.Node.draw(Node.java:520)
at com.jme.scene.Spatial.onDraw(Spatial.java:410)
at com.jme.renderer.lwjgl.LWJGLRenderer.draw(LWJGLRenderer.java:1199)
at jmetest.awt.swingui.HelloJMEDesktop.simpleRender(HelloJMEDesktop.java:127)
at com.jme.app.SimpleGame.render(SimpleGame.java:96)
at com.jme.app.BaseGame.start(BaseGame.java:84)
at jmetest.awt.swingui.HelloJMEDesktop.main(HelloJMEDesktop.java:131)
Aug 10, 2008 7:28:45 PM com.jme.app.BaseSimpleGame cleanup
INFO: Cleaning up resources.
Aug 10, 2008 7:28:45 PM com.jme.app.BaseGame start
INFO: Application ending.
The application centralizes the mouse and falls.