So, you know, I'm a fan on the Unibroue beers. I dig those labels too, and the names are unique. The beer itself is fantastic with Fin du Mond being one of the finest examples of that style I've ever tasted. One thing puzzles me however...on a few of the Unibroue beers as well as on the Trader Joe's 2012 Vintage Ale (don't laugh, it's really amazing for a $4.99 corked Belgian) which Unibroue mfgrs. for them, it reads "Ale on Lees". What does this denote exactly? I know what lees actually are, but when I google the term nothing specific comes up. Does it mean there's yeast left in the bottle, is it fermented differently?? HELP!