Now that I've metabolized the caffeine from the two-and-an-unknown-fraction pots of coffee I've drunk today (don't ask), I have it together enough to write about an unusually annoying glitch that plagues Linux users from time to time: Automatic mounting of USB storage devices stops working after you tinker with the systemware, usually after recompiling something or upgrading a package. I ran into this a few days ago but didn't think much of it because I've mostly been using Windows XP for work (yes, yes, you may now all laugh) but I decided to sit down and figure out what happened …