Ok we recently moved in. There is a problem with our kitchen three way switch. I have not opened the box yet, but feel comfortable doing so, and working with a volt meter and what not.
Here is the problem. The switch that turns off the light HAS to turn it back on. Once on, either switch can now become the switch that turns off the light. That results in both toggles being down when the light is on, and of course the side that turns the light off winds up with its toggle UP.
I've put in a three way switch in the past. So I am familiar with the common terminal and the traveler terminals.
Before I attacked this, I wanted to see what you folks think.