....and my downward scale movement started after sharing a big bag of popcorn (and some other no-nos) while I was on holiday in Florida.... I'm eating in the 60g range and losing steadily. When it stops, I'll go back down to the 30 range and see what happens.

Why don't you add a 1/2 piece of fruit daily to your diet and see if that helps.... the fruit is so lovely this time of year.... go for it!