Thanks chrisjj

http://www.ventismedia.com/mantis/view.php?id=5196

> Now it can do it in background.

Sure can!

> Thx to the devs

From me also.

Oh is this a new feature?
That's cool. Now it can do it in background.

I'm using the feature for the first time right now.
Never used it before cause I didn't want to wait for ?hours? before using my library.

Thx to the devs

Help's

Duplicate Content
... This feature only works for Tracks that have been 'Analyzed for Duplicate Content' when they were added to the Library. ...

Is in error - the node itself offers to analyse tracks.