The new updates fixes the following issues:
- Fixes an issue that occasionally caused blank or frozen video during a FaceTime call
- Fixes an issue that prevented some international users from connecting to 3G networks on iPad Wi-Fi + 3G
- Contains the latest security updates
If you jailbreak iPhone, unlock iPhone, jailbreak iPad or jailbreak iPod Touch stay away from this update as this might render your jailbreak and unlock obsolete. The dev team hasn’t yet released any news about an jailbreak or unlock for the iOS 4.3.2.
Also the update is minor in nature so you might get no benefits from upgrading from iOS 4.3.1 to iOS 4.3.2.