Also there are a lot of fake movie files on the network, especially if their speed is T3 or Higher. Try looking up the file with Bitzi(How to use Bitzi Web Lookup ...) If LW shows that a lot of people are sharing the file and there's nothing in Bitzi, thats a good sign that the file is probably fake.
Also here's another good read: Corrupt Audio - T3 Spammers; mp3 Bit-Rates Versus File Sizes

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