Jabba could've shifted over beforehand so he could walk around...somehow. I don't know, I just think the whole scene should've stayed on the cutting room floor. The Anakin ghost change sucks major ass. It not only looks stupid (he looks like a complete jackass), it is just retarded. But regarding Luke recognizing him...he is a Jedi and they do have those force abilities. I'm sure he could sense his father's presence. On the same topic, removing Anakin's eyebrows was stupid. I mean come one. Even if Anakin gets his face burned in ROTS, technology keeps him alive, why couldn't it regrow his eyebrows??