Quote Originally Posted by Kobin
"... Everthing seems to work as expected until 1/125, and then all speeds are the same to 1/1000. Even in A and P modes, when the program calls for a faster than 1/125 shutter, I only get the default 1/90..."
Long shot... especially since I don't much about Nikons. But Minolta SRTs have a "slow speed gear" which controls shutter speeds up to 1/60, the flash sync speed. Speeds above that are controlled by "something else" -- not exactly sure what, though.

I guess what I'm saying is that it might be something mechanical -- a lever not engaging, a stuck pawl... whatever handles the speeds that the "slow speed gear" doesn't.