For the first time, I had a "brown curry" dish at a nondescript Thai restaurant in Bethesda (Thai Corner?). I've had red, yellow, and green, but never ever heard of brown. It was pretty darn good and complex (cinnamon? Cardamom? What the heck is in there?). But it was a little tame, hinting that a more Chowhoundish Thai place might be taking this color curry to whole 'nother level. Any other places in DC/MD/VA to try the brown curry?