My iPhone 5 is busy downloading the new update from Apple, which brings it up to iOS version 6.0.2. The new version only offers up one area of improvement in the download box: "Fixes a bug that could impact Wi-Fi" I had noticed that my Wi-Fi connection occasionally would drop out, so I'm hoping this fixes it.
Apple isn't very specific in saying what the update fixes, so I'm going to have to assume this is it. You can pick up the update OTA, or via iTunes. It's a 60+MB download, which doesn't take very long on a decent DSL connection.