Ok, I was messing around with the D90 yesterday and my new 50mm 1.4D, and just for fun I threw on the SB600, because I was gonna take some shots of my wife in the house. I took about 20 pictures with different setting, and they looked pretty good as thumbnails, but then when I opened them up for some pp, I wasn't getting good focus on the eyes. I tried a couple of the Auto-focus modes, and manual focus, but most of them were just off by a bit.... I wish I had some pic's to post but I deleted them out of frustration. Any tips on how to get better at focusing? Is there something I'm missing?