Streamable suffixes define the file extensions which can be previewed before the download is finished. Unstreamable are the opposite, the file is useless unless fully downloaded.

Well the preview function 'Copy for preview' is not working very well and quite difficult to configure. I think the preview can be somehow enabled if you specify:

previewMethod_mp3 = path/to/executable

Check this document for more info, but be aware that these things might change in the next release or get dropped completly...

http://cvs.sourceforge.net/viewcvs.p...ed.htm?rev=1.4

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