The radio in my car works fine - until I turn on the rear window heater, at which point I get bad interference in the FM reception (CD works fine).
It's done this pretty much since I had the car, but there was a small period when it didn't. I don't know what stopped it or restarted it.
Any ideas what I should be looking for, as now the colder weather is here I will be needing to demist the rear screen more often again.