Photo Mechanic version 4.6.2.2 public beta 1 is available for download immediately, for either Mac OS X users or Windows users. Photo Mechanic is compatible with Microsoft's Windows 7, Vista, or XP Service Pack 1 - 3, as well as Apple's Mac OS X 10.4.11, or 10.5.x operating systems.
Courtesy of Camera Bits, the full list of changes in the new version is as follows:
More details and the program itself can be found on the Camera Bits website.