I inquired about this problem on my Ridgid. Pretty uniformly responses are to use a thick quality blade and go slow. I took off my 80 tooth Diablo thin kerf and put on a Ridge Carbide 40 tooth. Not quite as smooth as it is not the right tooth for a miter saw, but sure enough, my compound miter was strait not curved. Saving up for an appropriate miter blade. Thick kerf, 80 tooth and low hook.