After dieting off and on for 10 years, I have a strange new development: over a period of 3 months, I have not gained a fraction of a pound - nada. That's right, my weight is exactly the same as it was 3 months ago. I am utterly delighted by this - but also utterly bewildered. Has anyone heard of weight suddenly becoming stable - after a decade of yo-yo ups and downs? My eating patterns, by the way, are the same as before.