Alsoft released DiskWarrior 4.1 Monday, an update that brings full Leopard compatibility to the disk repair utility. The new version includes support for directory hard links, which is part of Leopardis Time Machine feature, and some unspecified improvements in repair speed.
The new version also supports the same Mac models as before, which means it does not boot the most recent Mac Pro, MacBook, MacBook Pro, MacBook Air, and Xserve models. Check out Alsoftis support site for more information.
You can find the download at Alsoftis Web site.