It says its most likely just a driver update and just to burn a new driver CD and reinstall drivers. The actual assistant package hasnt changed but some driver package has i guess.
Ah yes did it this morning. Though nothing has changed accept I think there is now a "brightness" icon down on the tool bar which may not have been there before I'm not sure.
The brightness icon was always present on my iMac. I didn't see anything in the new readme about the internal speakers not shutting off when headphones are plugged in, but alas, they still don't.