That "softness problem" is that people expect to be able to look at the pixel level and see the same sharpness as they see in a 4x6 in. or even 8x10 in. blowup. Instead they are looking at the resolution equivelant to blowing up a photo to 45x30 in. and seeing all the fine focus resolution of the lens and artifacts from examining the detail of a lossy compression from the ~18Megs of RAW data to a ~1.5M JPEG (Large Normal JPEG that is the default on the D100). There's several ways around this: shoot in RAW/TIFF, shoot in Fine mode, or understand and live with the fact that the finest details will get smoothed out by the JPEG compression algorithym.
Attached are a photo of a sunflower that I took with the D100 and my 50mm and a cropped image of the fine detail. (The origonal was shot in Large Normal no sharpening and was compressed to 600x400 with no enhancment. The crop also has no sharpening or enhancement.)
DaveDosch Take nothing but pictures, leave nothing but bubbles.