I have been having on and off problems with focusing. Yesterday afternoon I used the Focus Test Chart created by Tim Jackson (http://md.co.za/d70) and tested the nine cross sensor reticles on my D2X each separately. I didn't bother with the two outlying reticles but may go back and check those as well. Following Tim's detailed instructions I concluded that I only have problems with some of the reticles. Most of my shooting thus far has been at apertures of F8 and beyond which can hide the front and back focus problems if they are very subtle. Tim's test is done wide open. I used my 28-70 2.8 locked down on the Arca Swiss Ball Head mounted on my Gitzo 1325 with the SB800 Flash attached. Further, I used the self timer to avoid any camera shake. Per Tim's instructions only tested with AF-S and Single Area and focused on his test sheet from fairly close using each of the nine cross reticles separately resulting in nine Nef photos which could then be examined at 100% in Capture. My findings were: Upper Left Reticle: Slight front focus with Capture indicated focus point slightly lower Upper Center Reticle: Front Focus with Capture indicated focus point slightly lower Upper Right: Slight Front Focus with Capture indicated focus point lower Center Left: Focus Excellent with Capture indicated focus point very slightly lower Center Center: Focus Excellent with Capture indicated point very slightly lower Center Right: Focus Fair with Capture indicated focus point right on Lower Left: Focus Excellent with Capture Right on Lower Center: Focus Poor Back Focus with Capture focus point right on Lower Right: Focus Poor Back Focus with Capture focus point right on These results in AF-S help explain to me why when I use Dynamic Area Focus on fast moving small objects (e.g. birds) my shots are hit and miss. It all depends upon which reticle is in play for a given shot. I did get better results in Group Dynamic but still not what I expected and if I limit my shooting to the center reticle all seems fine, but why should I have to do that? I'm waiting to hear back from Nikon Service to see if I should send it in. I recommend you try the focus test yourself on each of your nine individual cross sensor reticles to see what kind of results you get. It may surprise you and if you've mostly been shooting at smaller apertures (e.g. F8, F11, etc.) then you probably wouldn't even have noticed it. I'm certainly not trying to start any trouble but I do think we ought to get what we paid for and not always have to wonder if the shot will come out as expected.