Not nuts (well, not today)
A few months ago I started smelling cigarette smoke in my office at random times. I'd complain to my boss that somebody was smoking on the floor above us and it was coming through the vents. He never smelled it. I asked the woman in the office next to ours if her boss smoked in his office. She said no. Then I started smelling it at home. Stale cigarette smoke, pretty much constantly now. Nobody smokes at my house. I was sitting here trying to do computery stuff, and it was driving me crazy. I Googled it. It appears a few thousand other people have this too. No cure, no idea what triggered it, but at least now I know I'm not one step closer to crazy land. /revelation