Update 2:27 p.m.: Apple has responded to the most recent set of problems. In a statement released to AllThingsD, the company said that it is investigating the "few remaining issues."
Original Post: Apple's software update for the iPhone 4S battery drain doesn't seem to fix the issue for all affected phones, meaning this might require more than a quick-fix from Apple. New phone owners had complained of faster-than-usual battery drain for phones that should have over 200 hours of standby time. Some had schemed possible solutions to the problem, but finally Apple acknowledged that it was a bug on their end. Earlier this week, an update came out that should have made it all go away. Apparently, the update doesn't do the trick.
Only two days after releasing iOS 5.0.1, those with sluggish phones have taken to Apple's forums, complaining of zero battery-life improvement. The thread shows strings of commenters reporting that even after updating the software, which specifically claimed a bux fix for battery drain, the phone's sucking up battery-life, losing a noticeable percentage by just opening a single app, or unplugging the phone. And not only does the update not fix things, its making things worse for others. Some who had healthy phones before, after upgrading, are complaining of new battery issues.