The original
STAR WARS:
Grand Moff Tarkin: (to Darth Vader): "The Jedi are extinct. Their fire has gone out of the Universe. You my friend are ALL that's left of their religion."
Yet in the very next film
The Empire Strikes Back suddenly the Emperor himself is a Dark Jedi Sith who directly commands Darth Vader. You would think Gand Moff Tarkin would have remembered that particular fact as the rest of the Imperial Fleet under the command of Vader certainly is in ESB.
Then we have the Prequel situation which SHOWS Obi Wan Kenobi working with and calling R2D2 by name a few times in the prequel trilogy...
Yet again, in STAR WARS when R2D2 shows up
Luke: "This little Droid. It's looking for its former Master, but I've never seen such devotion in a Droid before."
Ben Kenobi (to Luke): "I don't recall ever owning a Droid."
Yep - ROCK SOLID CONTINUITY THERE...oh, wait...