I decided to take a break from surfing the web on a rather upsetting topic, picked up my fiddle, played a little and thought:
"Boy, this REALLY needs some more rosin- wonder why I didn't notice that before?"
And then, before I dug out the rosin, I noticed that when I picked up the fiddle, the shoulder rest had fallen off!
So I put it back on... and like magic, the sense of not having enough rosin disappeared!
Background.... over the last year, I've been using less and less rosin, and my recent move towards using a shoulder rest seems like it's working in with that tendency JUST GREAT!