Technofetishism XXVIII
Mystery solved! What I thought was a smudge on my PowerBook screen -- and which I've tried to clean off to no avail using the iKlear Apple Polish Kit -- is in fact the luminous Apple on the lid of my laptop shining through the display. It's only visible when the sun is shining on the flip top of my PowerBook, and it's good to know that my laptop display doesn't have a permanent smudge worked into the screen. Mystery solved!