I and many others have used Plus Optimizer repeatedly with no problems. HFS+ is the same, whether running OS X or OS 9. It's always recommended that you run DiskWarrior immediately before optimizing. > I would NOT use DW to optimize, tho. After I optimized a Jaguar volume > it become unbootable and nothing would fix it. > > Ron Stephen Hart http://www.nasw.org/users/hart/