What about the annoying fact that the dubbed track never matches the character's lip movements? If that doesn't break immersion than I don't know what does.

O_o

I´ve been watching dubbed stuff for more than 35 years and lip-synching was never an issue... I can´t even remember someone even bringing that up before... :)

That said, dubbing is a nice addition, as many mentioned before; it just must be well done... Unfortunatelly, in my country, ANH and ANH:SE had the most atrocious dubbing I´ve ever seen in a movie. Aside the voice actors chosen don´t making justice to the original actors in general, two situations have horrified me the most: Han Solo, with the replaced voice and quite poor translation of the lines, looks awfully gay, specially when talking to Luke; the other moment, Obi-Wan´s memorable line "Who's the more foolish: The fool, or the fool who follows him?" was simply wiped... instead he repeats some previous line "You must do what you feel is right, of course. She needs your help." All I could thing when I first heard that years ago was W.T.F... ESB and RotJ were a little better but I prefer to watch the movies in English at any time...