Killa - go back to the groundbreaking thread started by Charlie Chalk on the 1.03 firmware. (Groundbreaking in that it was another D70users first in our history of discovery - pulled alot of attention from DPR and most didn't believe until it was announced a week later by Nikon). You'd see I was among the early adopters. Like the 1.02 version before - it could be said to address something I wouldn't see either - high shutter colour shift, cont shooting in medium jpg
mode, improved simplified chinese menu options, etc. but I updated on the off chance that, like car manufacturers' servicing handbooks; it may address certain issues not documented.
Actually I've found NC4.2 made a bigger difference - high ISO colour noise has improved a sh^tload, and the noise reduction setting was turned off!