iOS 5.0.1 brings address book bug, no battery fix

Apple's iOS 5.0.1 update is trickling out, but it seems the fruity company has skipped a few quality control steps: not only is the battery drain issue not yet fixed, but a new address book bug is rearing its ugly head.

Apple's iOS 5.0.1 update was designed to address a major battery drain issue primarily affecting the company's latest iPhone 4S handset, but also cropping up on older devices too. Thanks to a location-based polling system, iPhones are running out of charge far quicker than they ever should.

Sadly, the update appears to do little to address the underlying cause: numerous users on Apple's support forums report that battery life is unchanged after installing iOS 5.0.1 on their devices, even following advice to give the handset a full discharge and recharge cycle - a step made ironically easier by the battery-draining bug.

While that's bad enough, Apple has a larger problem on its hands: the update appears to introduce an entirely new bug, which causes handsets running the latest version of the software to ignore contact names when calls and messages are received.

Using iOS 5 or lower, iPhone handsets automatically search a user's address book to find a contact name for incoming calls and messages, presenting that rather than a number. It's a feature that has been a staple of mobile phones since the first Nokia bricks, but Apple's latest update is causing one or two issues for users.

First spotted by Paul Hontz over at the Startup Foundry, the bug only appears to affect iPhone 4S handsets - those installing the update on iPhone 4 devices appear safe from the flaw. The problem appears widespread, but has yet to be acknowledged by Apple in any official correspondence.

With the company's fans already sore at the bugs in iOS 5 at launch - plus Apple's decision to take Siri Assistant away from its users in order to force them to upgrade to the iPhone 4S to get it back - Apple will have to address this problem quickly if it wants to retain its reputation for quality.