Saw Arne’s response before having a chance to reply to enricochico and updated to 4.2.1. Thanks to you both.
Of course, now that I’ve messed about so much with the favicon and cleared my cache a thousand times (well, maybe not quite) and all that, not only am I not seeing the favicon at my site, I’m not seeing them anywhere, on any sites, on my browsers.
Sigh.
LB