I recently picked up a D800 as I was impressed with the video capabilities. I was messing around with the AF-F target tracking mode and noticed it seems to focus once, but doesnt really continue doing any kind of AF after that. However when I was in BH photo prior to purchasing, the AF tracking was spot on in live view. Its certainly not the biggest deal as any time Im in live view is for HD Video and I am manually focusing, but what gives? Am I configuring something wrong or missing a step?