I have a G4 Digital Audio - which is behaving very oddly. The specification, for reference and in case this has a bearing on matters, is that it has 1GB RAM, DVD-RW, Zip 250, a Sonnet Duet 1.6GHz accelerator, Sonnet SATA card (with a 500GB SATA drive attached), Maxtor 75GB hard drive, Maxtor...