No, don't think so -- I don't play with anything along those lines. I'm thinking it's much more likely related to Netscape 4.73. (I did say "ancient". You thought I was kidding. Popup blocker? I settle for avoiding sites with popups when I'm on this machine.) ) I do have a Firefox on here, & don't see it with that, FWIW.
Fascinating - although it occurred during drive time, our most recent megaclick came in the middle of a half hour period where none of us were logged in and on the board (all eating dinner, I guess...or lurking).