Yes, Togs, I am well aware of the history of problems with the Federal Pacific breakers. I got educated over on the THS electrical wiring forums.
However, I know they are working... because I've tripped them on occasion...
The panel was inpsected when I bought the home and there was no sign of arcing (a different FP problem with the Stab-lok panels) or of overheating. I am also careful not to overload circuits.
Of course it's on my list of things to do, that is, replace all the FP panels (there are three on the property), but it's relatively low on the list.
You can find FP breakers, however, they tend to be very expensive. Fortunately I have some spares just in case.