I know this is quite an old thread but certainly an important one I think. I have a 50 mm f1.4 lens which I bought when I was using a D40. On that the D40 I really liked this lens but when I bought a D7000 I was not pleased with the results. Recently I adjusted the autofocus for this lens and now it is working very nicely. It needed an adjustment of -15 which explains why I was not happy with this lens on the D7000, every photo was out of focus when using wide apertures! From what I understand, there can be camera to camera variation which may partly explain why it worked nicely on the D40 but not the D7000. Also, the higher resolution of the D7000 is certainly going to show up poor focusing to a greater degree than the D40.
Anyway, don't be lazy and micro-adjust if you suspect a lens is not autofocusing correctly. If my experience is anything to go by, it is worth the little effort required.