Apple releases a new firmware upgrade today for the iPhone 4 / 3Gs / iPad / iPad 2 / iPod Touch 3rd and 4th Generation.You can download the software directly through iTunes. If you've unlocked or jailbroken your device, we don't recommend updating your device yet. There's no solution for the new software.
Here's what you get with the upgrade, taken from the Apple website:
"This update contains changes to the iOS
crowd-sourced location database cache including:
#Reduces the size of the cache
#No longer backs the cache up to iTunes
#Deletes the cache entirely when Location Services is turned off"