Download links are currently presented like: http://sourceforge.net/projects/filezilla/files/FileZilla_Client/3.7.3/FileZilla_3.7.3_src.tar.bz2/download
It currently works just fine without the "/download" at the end, and there are some non-browser downloaders that get confused by it.
For example, some versions (but not all) of wget will default to saving with the filename "download"
And easy_install apparently just won't work with the "/download" appended at all.
It would reduce confusion for those cases to simply drop the "/download" in places like the detail drawer of the file release system, or from the "direct link" URL on the download countdown page.