Back in March Apple released a new update to its iOS 7.1. Among the accompanying one-page release notes it published on the occasion was the following line:
This line is remarkable for what it implies about email usage: that there are enough people out there who have 10,000 unread emails. Enough of those users noticed the bug and brought it to Apple’s attention. Presumably, Apple fixes thousands of minor bugs in between releases, yet this one made it to the main release summary, prominently featured as a major fix.