Sigma is offering free upgrades to four of their lenses that don't perform as expected on a D3. The 10-20mm and 30mm f/1.4 HSM lenses don't automatically crop to the DX format when mounted, while the 120-300mm f/2.8 and 300mm f/2.8 do (and shouldn't). Servicing information will be posted on the Sigma Web sites shortly. In the meantime, you can contact your local Sigma distributor for more information: Sigma Distributor Web site.