The information displayed in the quick summary area (when you mouse-over your name at the top bar, what is it called?) is showing wrong number of favorites for me.
This is what I am seeing:
But I am positive that I did not add 7 favorite items today or this week. I had added two questions to favorite today, and the rest have been in my favorites before that.
I do not have a way to confirm this with fact as the favorites tab does not provide you with information about when a question was favorited. But I sorted them by "added" and can confirm that the first 7 of them were not added today.