This year both of our pear trees (especially our dwarf Bartlett) have a new foliar disease that I've never seen before. It looks a lot like edema with the bumps, but with a lot more discoloration and it affects the fruit, too. The darker discoloration was more common than the lighter not too long ago, I think (but they're both the same thing). The pictures aren't good; the leaves are a lot bumpier than they appear. We're getting rid of the most heavily afflicted tree tomorrow for unrelated reasons, but I'm still curious what this is.
Here are some pictures. It began around the time the blossoms were still on, I think.
Our pear trees are not close to each other. One's in the front and one is out back. They've both had fire blight before, but it went away.