Hey Starfish - I was thinking about this thread last night and I thought of something else. You've lost 16 lbs - have you changed your profile in whatever nutrition software that you are using? A 16 lb loss could very well have reduced your caloric needs, so you may find that now you need to cut back even more. What worked when you were X weight might no longer work when you are X-16. While your current level of consumption might have created a caloric deficit at your starting weight, it might be closer to 'maintenance' level at your new weight - hence the lack of progress. If you think this might be the case, you might want to look into dropping your intake by a small amount and see if that gets the loss moving again.

I know that for me, the effort that I have to put in to lose weight at 166 lbs is way less than the effort I need to put in to lose weight at 150 lbs. It's unfortunate, but it's true.