DxO Labs has posted a public beta of the Windows version of DxO Optics Pro v4. Changes for v4 include improved color and image geometry control as well as a new user interface that promises a faster workflow, according to DxO Labs.

An earlier story on this site has additional details on v4.

The final version of DxO Optics Pro v4 is scheduled to ship in September 2006 for both Windows and Mac (and it will run natively on Intel Macs).