when vader is standing in front of the falcon, right after he orders a complete scan of the ship, he ponders for a moment, and then says to himself......i sense something....somthing i haven't felt....., and then he storms off like a man on mission.
i know, i know, back in the good old days, when tatooine was still the farthest spot from the center of universe, not grand central station , lucas meant for that line to be about obi-wan.
but lets take a look at who's aboard the ship, and who might be giving off this aura of senses.
obi-wan - vaders original master
luke - vaders son (who by the way is carrying vaders old light saber from his hilt!)
c3p0 - vaders droid that he built from scratch (and gave as a present to his mom)
r2d2 - astromech droid who accompanies vader on his 1st space exploits
that some powerful senses being eminated from this supposed empty ship!
the only sensing voids should be han and chewie (although, don't be too surprized if in one of the two next movies, ol vader has some kind of adventure with the ageless wookie)
with all that baggage contained aboard the falcon, right in front of him, the only thing that his great sith mind can sense is obi-wan?
allright george, lets see you paint yourself outta this corner!