Replaced the stripper and fill cup - turns out that the fill cup came with the locking tab broken off. The stripper had a missing paddle, and ice cubes would jam and shut down the ice maker periodically.
Let the ice maker warm up after you remove it so the plastic is not so brittle. You have to pry the old stripper out. Make sure the new one locks all across the front. My refrigerator has the ice maker mount toe the side instead of from the hangers in back. I wasn't sure how to remove it, but it turns out not to be a problem. Just take the one screw towards the front side all the way out, and then the ice maker slides out from the two knobs holding it in the back side.