In the carbon freezing scene Han did still have the upper arm shackles on when he was frozen. I guess they forgot this when they filmed ROTJ. i have heard explanations that they were also made of carbonite and that they melted when he was defrosted. I'm going to keep them on in ESB and you will see them melt away in ROTJ.
The hologram throbbing is only a test using standard settings of the plug-in used. I don't want to show the final Emperor until its released.
Vader's helmet moving in the wind bothered me too for a while until i sat down and thought about it. I think it would move that way given the strength of the wind. I may tone it down a little but at present i may not touch it at all.