Apple has released iOS 6.0.1, a bug fix revision, for iPhone, iPod touch, and iPad. If you're using an iPhone 5, Apple has also released an Updated for iPhone 5 which will download and run before the iOS 6.0.1 update. Here's what Apple has to say:
This update contains improvements and bug fixes, including: - Fixes a bug that prevents iPhone 5 from installing software updates wirelessly over the air - Fixes a bug where horizontal lines may be displayed across the keyboard - Fixes an issue that could cause camera flash to not go off - Improves reliability of iPhone 5 and iPod touch (5th generation) when connected to encrypted WPA2 Wi-Fi networks - Resolves an issue that prevents iPhone from using the cellular network in some instances - Consolidated the Use Cellular Data switch for iTunes Match - Fixes a Passcode Lock bug which sometimes allowed access to Passbook pass details from lock screen - Fixes a bug affecting Exchange meetings
For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222
You can update over-the-air (OTA), or you can update by connecting to iTunes and going old-school.