Thanks. I mainly use the unpowered hub for XSKey and SD Card USB reader thing and then just flash drives, and sometimes Bluetooth dongle. It was just once I tried to get Rhapsody 5.6 (X Server 1.2v3) on my TiBook for fun, but to install it insisted I boot from the CD. I backed up the HD by putting TiBook in disk mode, have a mac mini booted off a leopard disk, then connect my USB disk to the hub on the Mac mini. (I cannot remember why I didn't just backup to my FW disk). Anyway after all of that and using identity tool and preparing the internal (after a backup) the rhapsody CD got to a loading screen in colour, then after 3 seconds just shut down. I just then decided to clear the stuff to make the identity back to the TiBook and then restore from the USB disk connect to hub on the mini, which then over FW to the TiBook in disk mode, (that was because mini has 2.0 usb). But you know probably won't need to do that again, and won't if there are risks power related.