In reply to BnB:
I bought the DVD last year, must watch it some time soon.
Saw a screening at Hammersmith Riverside 21 years ago on a scorching hot day, I went to a quadruple bill of films to hide from the sun. Brighton Rock and The Third Man as one sort of double bill, and Wim Wenders' "Wings of Desire" and "Faraway, So Close" as a more directly-linked-together double bill.
In The Third Man, as legendary as Welles' "cuckoo clock" speech may be, it feels really forced and out-of-place. It is a strange story, really, in terms of Harry Lime. Is he an antihero or just an out-and-out scoundrel with no redeeming features at all?
At that screening, right at the end when Alida Valli walks straight past Joseph Cotten without even acknowledging him, one lone viewer tried in vain to start a round of applause. It fell very flat and was a bit depressing, which suited the Graham Greene-ness of the whole thing :-D