I have the same issue. What's really odd is as a consultant i have two different clients, each with their own licensed QBs Premier software. With one client the detail bill description carries over to the customer invoice (when marked as a billable to a customer) and overrides the generic item description, with the other client the generic description prevails. I have no idea what "setting" to change to make the detail bill description carry over to the customer invoice. Very frustrating!!!