[01] Leia remembering her “real” mother
In “Jedi”, Luke asks Leia if she remembers her real mother, and Leia provides a distant, but quite detailed recollection from her earliest memories of mum. In the context of the scene, there’s no doubt we’re talking about Leia’s natural mother, yet Padme has died just after giving birth to the twins

[02] Tatooine memory loss
It wasn’t just C3PO who had his memory wiped: how come neither Uncle Owen, Aunt Beru nor Ben Kenobi remember either of the droids when they return in Episode IV? Ben specifically says he can’t remember ever owning a droid before which, strictly speaking, is true, but he surely would have remembered both R2 and 3PO. Similarly, why doesn’t R2 – assuming he didn’t get a memory wipe as well – retell the full story of Episodes 1-3 to 3PO, or to Luke (who by “Empire”, clearly understands R2 language)?

[03] Powerful, but hard to detect, is the Dark Side
It seems difficult to believe that the villainous Sith Lord, Darth Sideous, could swan around any number of Jedi masters posing as Chancellor Palpatine, without a single one of them picking up on his evil alter ego. Surely he must have been putting out some nasty Dark Side vibes which they would have honed in on?

[04] United we stand, divided we hide
OK, they both needed to lie low for a bit, and it makes good sense to keep an eye on young Luke, but surely it would have made more sense for the only two surviving Jedi masters in the universe to actually hide together? Not much chance of organising any sort of counter-attack when your chief ally is hiding in a swamp on the other side of the Galaxy. Maybe Obi-wan just couldn’t bear the thought of putting up with Yoda mangling the English language for another 17 years.

[05] “You can’t win Darth. If you strike me down, I shall become more powerful than you can possibly imagine” – not!
Despite Ben’s bold claim to the above, once Darth swats him down in Episode IV, his only impact from then on is to deliver a few spirit-side platitudes to Luke, something he could have done much more effectively if he was alive – hardly compelling examples of power beyond possible imagination. On another point: was does Ben address him as “Darth” and not “Anakin”? Having been together as long as they were, it would be natural for Ben call him Anakin – if nothing else, it would probably annoy the hell out of his former pupil.

[06] “What about the baby?”
Did Vader know that his child survived? He certainly didn’t know about the twin, as shown in “Jedi”, but it’s not clear if he ever knew about Luke before “Empire”. “Sith” is ambiguous on this point. Vader learns Padme dies, but there’s no mention of the baby’s fate to him. Does the Emperor know? It seems likely that Vader assumes the child also died; otherwise you would be expecting him – if not the Emperor - to be scouring the galaxy looking for Luke long before he gets on the trail in “Empire”. (And on that point, assuming Luke is being hidden from Vader, surely it would’ve made more sense to hide him somewhere less obvious than Anakin’s home planet, with Anakin’s step-brother, under the name of Skywalker???). Most likely, Vader got interested in the hotshot who trashed the Death Star in Episode IV, and finally put two and two together, especially when he learnt the kid’s surname was Skywalker.

[07] Not as sprightly as he once was
In Episodes 2 and 3 – filmed in the 21st century - R2D2 can jump, bounce and even fly, and moves around very quickly, but in Episodes 4 to 6 – filmed back in the dark ages - he can only roll slowly along.

[08] Giving Credit Where Credit’s Due
In “Empire”, the ghost of Obi Wan tells Luke to go to the Dagobah system, where he will meet Yoda, “the Jedi master who trained me”. Now hang on – all the training we see Obi Wan undertake happens in “The Phantom Menace” under the supervision of Qui Gon Jinn. So Obi Wan is selling his old master rather short, particularly since we find at the end of “Sith” that Yoda’s teed Qui Gon up to do some posthumous post-grad training with Obi Wan

[09] Disappearing Dead Jedi
Not an error, just another unexplained phenomenon. Why do some Jedi disappear when they die, while others require a funeral service? Obi Wan and Yoda disappear, Qui Gon and Anakin get the Joan of Arc farewell. Maybe you have to nominate when you sign up for the Jedi course which way you want to go.

[10] Ben, the two of us need look no more….
We never find out why Obi Wan changed his name to Ben for his life on Tatooine. If it was to offer some sort of anonymity from the Empire, he’s obviously made the same dumb mistake as they did with Luke, and forgotten to change his surname