We have previously stated that DiskExpress Pro is incompatible with HFS . David Badovinac notes: "The fact is that DiskExpress Pro won't even open after Mac
OS 8.1 is installed, no matter whether you have installed HFS or not. After you install Mac OS 8.1, when you try to use DiskExpress Pro, you will get a message that "HFS Plus is not supported in this version of DiskExpress Pro" and it shuts itself off. The Alsoft people told me today that 'they are working on it.'"
MasterJuggler Pro Tim Ditch writes: "After updating to OS 8.1, MasterJuggler Pro reports all fonts as 'possibly corrupt or defective' upon opening. Alsoft Technical Support is investigating the problem. Temporary workaround is to disable Font Guardian in MJ Pro."