In the last couple weeks, I learned that there is a difference between jerry-rigged and jury-rigged. Until now, I thought they were just different ways of saying the same thing and have used them interchangeably.
Jury-rigged describes something that is built in a makeshift way with materials at hand, and usually intended to be temporary.
Jerry-rigged (or jerry-built) is similar, but also implies shoddy construction that is unlikely to succeed in its job or last very long.