Totally unexpected side-effect of collecting perfume samples and then storing them incorrectly: at some point during my London-Reykjavik-Boston hop, I managed to knock the top off one of those daft little bottles of "Still" that salesman foisted on me a few months ago. This bottle was lurking at the bottom of my backpack, which at the time was also serving double duty as the guardian of my laptop.
What I'm saying is that my iBook marinated in "Still" for at least three days and two plane rides, and now it wafts up at me every time I open the damn thing.
Could be worse, obviously. I could have accidentally left a bottle of "Angel" in there, I suppose. But still! Very! Unnerving!