no I can tell you right now that looks an awful lot like the start of mold. You'll know for sure just by giving that brown bit a little squeeze, if it just falls apart its mold or bud rot, and thats not good, Given the proper conditions mold can spread rapidly wiping out entire plants in a matter of days or weeks. I live in a place thats very wet with lots of humity, just perfect growing conditions for mold. Ive found over the years that I can only grow plants with great mold resistancy or else my harvest is crap. Im guessing your bud is around the 5th, maybe 6th week of flower, THats when buds start to fill in, get dense, and have lots of areas for water just to rest nestled inside the buds just askin for mold. I would have to bring in all my top colas at only about 5 weeks of flower and then harvest all my lower buds at 7 weeks. If you do spot mold, immediately seperate that bud from the plant and continue to check the plant over and take every last bit of mold that was touchin the plant off, not touching the moldy scissors on other buds. Usualy I just end up cutting off the branch that has the moldy bud, less worry. lol well I like to ramble, Check that shit out on that bud in your pic, I wouldnt want to see that spread anymore if it is mold. Hope that helps, happy toking, nice looking bud btw