In the meantime, however, I've been reading this thread, and just wanted to add a note to the discussion about the severed arm. In other scenes where a lightsaber cuts through something (especially in the PT), there are burn marks along the cut. I don't mean scorch marks (though those are there, too), but rather, glowing reddish-orange-ish burn marks. You can kind of see what I mean here:
Other examples include earlier in that duel, when Dooku cuts Obi-Wan's arm and leg, as well as when Anakin loses his limbs at the end of ROTS (I was looking around the interwebs for images from those scenes, but couldn't seem to find any good ones).
Adding this to the end of the stump might add more of a sense that it was cut off by a lightsaber, along with creating continuity with much of the rest of the series.
Hope this helps!
Take care,
Sojourn
P.S. As I was writing this, I noticed that professa skiving at work beat me to bringing up this point, though I hope I helped elaborate on it a bit -- especially since the effect to which I'm referring looks a little different than a cigarette, though professa skiving at work's version doesn't look too shabby at all.
