Help with USB problems

I have found that strange USB problems creep up occasionally, often with no obvious cause (see, for instance, this week's Ask TUAW comments). I myself have a USB hard drive that sometimes just randomly disappears from my desktop and I have heard quite a few other folks report similar problems. Well MacFixIt has a nice tutorial up that offers some good suggestions from the obvious (unplug and replug) to the not so obvious (replace the relevant kernel extensions). So if you've ever had USB problems, this would be a good one to file away for future reference.

[via MacVolPlace]