virtualbox.org

I have tried to download VirtualBox 4.1.4 Software Developer Kit (SDK) All platforms
http://download.virtualbox.org/virtualb ... -74291.zip

When i try to decompress it, it says that is not a valid file. What could be happening?
(I have tried in Linux and Windows)

BTW, the md5sum of the zip file downloaded from your page is: 54c65fd7edf3e9b2529cb939661c6f83
And the one that you say it should be is: 83fe944cb4edd1837bae0165ac7e1f99

Am i doing something wrong or is there something bad?

Thanks.
Borja.

Downloads and unpacks just fine for me.

Thanks!! It was some misconfuguration on company proxy...
Sorry for disturbing.