In a gesture of surprise, Apple has released iOS 5 Beta 5 (build 9A5288d) developers to Saturday. Apple publishes generally new seeds of developer week. Alongside the iOS Beta 5 version 5 is Xcode 4.2 Developer Preview 5, iTunes 10.5 Beta 5 and Apple TV software Beta 4.
iOS 5 Beta 5 is available as an update of the air, but according to the release notes, users must first erase all content and settings by selecting settings > General > reset > erase all content and settings. Apple recommends that backup of your device with iTunes 10.5 Beta 4 or iCloud before installing iOS 5 beta 5 and restore later. That said, some users have upgrade fine without going through this process.
BGR records release notes, which details some fixes, but no major new features. We are looking for in what other changes may have occurred.
Hearing aid mode is said to be new in iOS Beta 5 5:
Over the air Update Beta 4 Beta 5 is 128 MB.
NatesTechUpdate offers this video to some of the new iOS conclusions 5: