Apple have today released an update to iOS 5 which should resolve some of the battery issues which some iPhone 4S users have been reporting. It also adds multitasking gestures for the original iPad, which were inexplicably left out of the initial iOS 5 release.
The new update is a test of Apple’s new ‘over the air’ delta updating. In simple terms, this means that only the files which have changed since iOS 5 need to be downloaded and updated, rather than the whole ~650MB package as before. This in turn will mean Apple’s servers won’t be so busy, minimising bandwidth problems we’ve seen on almost all previous updates on launch day. Note, though, that if you choose to install via iTunes, you’ll still need to download the whole package.