Who could forget the lightsabers. Luke's is not even given adequate treatment in A New Hope, and is even green on the Falcon. When it's not green, it's in its original form, which does look crappy I'll admit. While I'm not for changes, if you're going to do them, do em right. Vader and Ben's got the ultimate treatment in ANH and for a couple of shots, Ben has Mace Windu's saber color. What's up with that?
In Empire and Jedi, there are major problems with the lightsaber colors and apperance that were never originally there. If it ain't broke, don't try and fix it.