This behavior was reported by a user who had been formatting the internal drive with FWB's Hard Disk Toolkit (HDT) 1.8s. The problems were solved after the drive was reformatted with Apple's Drive Setup utility.Digi is currently recommending that the startup drive always be formatted or initialized using the software provided with the Mac OS. This should be either "Apple HD SC Setup" or "Drive Setup" depending on which version of the Mac OS is in use.