DiskWarrior 4.4 Compatible with OS X 10.8 Mountain Lion
DiskWarrior 4 version 4.4 was released last September and is required to run an installed copy of DiskWarrior while started from 10.8 Mountain Lion.
If you haven't already done so, you can use the free updater for existing owners of DiskWarrior 4 versions 4.0-4.3.