Twitter
June 12, 2009, there was a serious problem with the unique number that identifies each tweet. This was called a possible "Twitpocalypse". (This is a combination of Twitter and apocalypse). The number that labels each tweet went beyond the limit of 32-bit signed integers. That limit was 2,147,483,647 messages. While Twitter itself was not affected, some third-party clients could not access recent tweets. Software developers made Patches quickly. However, some iPhone applications had to wait for approval from the App Store.