Today, Apple, Inc. released iOS 4.3.1 for mobile devices. (Version 4.3.1 (8G4). Plug you iOS device into iTunes to receive the update.
Apple states the following about the update:
This update contains improvements and other bug fixes including:
• Fixes an occasional graphics glitch on iPod touch (4th generation)
• Resolves bugs related to activating and connecting to some cellular networks
• Fixes image flicker when using Apple Digital AV Adapter with some TVs
• Resolves an issue authenticating with some enterprise web services
Products compatible with this software update:
• iPhone 4 (GSM model)
• iPhone 3GS
• iPad 2
• iPod touch (4th generation)
• iPod touch (3rd generation)
This update contains security content originally included in previous iOS Software Updates.