Among the 50Ks, I have not been too impressed with the Chicago stations for a month or more. Some nights, they sound normal here in Ohio (normal is to say they are strong). Other nights, even WMVP hasn't come in too well.
One big anomaly I have noticed is KDKA. Some nights, it blots out WBZ. For years and years, it's been the other way even with Pittsburgh being a little less than 200 miles up the road. KDKA's signal usually has been terrible in this region, certainly during the day if not at night.