Here's the response I got after contacting PlayStation Support:
Hello M,
The update you are requesting for the game Angry Birds, is not a game update. It only changes the developers name from Chillingo to Rovio. This change does not affect the game itself. There are no better performance or better frame rates in the game. Again, please be aware this is not a game update.
You can update your PS Minis Angry Birds -- if you contact customer service
Sep 8th 2011 7:37PM (Joystiq)Hello M,
The update you are requesting for the game Angry Birds, is not a game update. It only changes the developers name from Chillingo to Rovio. This change does not affect the game itself. There are no better performance or better frame rates in the game. Again, please be aware this is not a game update.
Regards,