https://www.blackberry.com/Downloads...356FCC56D801D1
Software For BlackBerry® Curve (TM) 8320 smartphone
BlackBerry Handheld Software v4.5.0.255 (EastAsia)
Package Version: 4.5.0.255
Consisting of:
* Applications: 4.5.0.162
* Software Platform: 2.7.0.103
* File name: 8320EastAsia_PBr4.5.0_rel255_PL2.7.0.103_A4.5.0.16 2_Vodafone_Essar_Limited.exe
* File size: 88.77MB
Note: The Software Platform and Applications version numbers can be found under Options-About screen on the handheld.
This will be a lower System Software than 4.5.0.161, but an upgrade on Core Applications
1. Download the files
2. Install the files to your PC. Vista users right click on the exe file and select Run as Administrator.
3. Delete the vendor.xml file, you can use search on your PC to do this. It's found here: c:\program files\common files\research in motion\apploader
4. Open Desktop Manager, connect your device, be sure it runs a back up, then run Application Loader. If you have 4.5.0.161 you will have to run Loader.exe found here: c:\program files\common files\research in motion\apploader
5. Do not touch the device until the prompt reads "Installation Complete" which could take as long as 45 minutes.
For the best way to upgrade your device click here. Since the system platform is a rollback, if your on .161 and not having any trouble, wait.
I have little doubt there will be another release coming soon.