When we started developing with Scrum, it was just the development team using Agile, but we were one of many teams still working in a waterfall style (one long cycle with a delivery at the end). This introduced a couple of irregular circumstances when we tried to follow the Scrum process as best we could, for example we always had 2 week Sprints, starting mid week and could fit 3 sprints into the larger delivery process, but we would have a couple of extra days at either end where we couldn't start on the next delivery because the one we had finished (early) hadn't been submitted yet.
