I just fired up my CP with a cheapo 4 port hub, self powered. U360 worked fine, but when i plugged in the optiwiz 1 (supporting Turbotwist 1 and a Happ 3" TB) it didn't work. I have the windows XP standard sounds for usb connect/disconnect, and It sounded like a xylophone recital going on. Finally it gave up and said a usb device had malfuctioned.
everything worked when plugged direct to pc. Sigh, off to buy a 5v adapter for probably more than the hub cost.