Hi!
I was having problem on completions for class PhysicsNode, it begun a few days ago. I thought on going to eclipse forum but… well, the point is, if you go on this problem, the solution is I wasnt adding this jMonkeyEngine3.jar to my project, I was only adding the the project jme3 that I had created as another project on eclipse. By adding the sources, eclipse got lost but only on this class and only after it tried to send usage data over internet. What a mess… well, thats the tip. :>