Apple issued a surprisingly fast update for its recently released iOS 4.3. The 4.3.1 update provides a variety of fixes for a graphics problem (4th generation iPod touch), cellular network activiation bugs, display flicker when using the Digital AV Adatper wiith some TVs, and authenticating with some enterprise web services.
The update came in a variety of sizes depending on the device to be updated.
iPhone 4: 666 MB
iPad “1”: 593 MB
iPad 2: 620.8MB
I do not know what the update file sizes are for the iPhone 3GS or 4th generation iPod touch.