The radio bit of the BBC iPlayer got a software bug, and they sorted out a patch quite quickly.
That's the short version. If you'd like a longer one, try this. Warning: contains words like Kanban, Scrum, Trello, JIRA, Github, Bug Triage, Hotfix and more.
There is a school of thought that journalists should learn about code; decoding this lot it beyond me, never mind code.