A short in the main room light fixture
She shorted out another fuse while replacing a light bulb that I'd knocked the little cup thingie off of (it's decorative, keeps dust from falling on the bulb.) It kept blowing the circuit breaker while the light was on, so there's a permanent short in the system and Stan's going to replace the light. Hopefully, he goes all the way and takes out the cloth and wire wiring that's holding it together.