Here's my puzzler of the moment: I have a Creative USB headset (the Fatal1ty gaming headset for Mac, which I bought at an Apple store). It's been working fine via USB (with the notable exception that it stops working easily if even slightly jostled). In the last few days, however, it stopped working when plugged directly into the Mac. The audio out still works, and it shows up as an audio input device, but when selected it does not detect any incoming audio. I assumed it was a headset problem until I tested it plugged into a USB hub - plugged into the hub, it works fine. I'm not sure where to go from here - I tried resetting the PMU, which is the nearest I can find to releasing USB memory, as well as leaving the machine powered down with all devices unplugged for several minutes - no joy. Any ideas?