I don't regard the 24-85mm as one of Nikon's better zoom efforts. It is soft in the corners at 85mm on a D1, though I'm a little surprised to hear you say that you think it's soft in the corners on a D1 at 24mm (on a 35mm body, it is).
Thom Hogan
author, The Nikon Field Guide
author, The Nikon Flash Guide
author, Complete Guide to the Nikon D1
www.bythom.com