For users of older S notebooks, you may want to check out Sony’s Support Site for the latest updates.
On my S, there were quite a few since the new year.
The most interesting is the BIOS Update:
This utility updates the Phoenix® BIOS to version R0071G4, and resolves the following issues:
Video corruption when power management is enabled
DVD playback issues
So, be sure to update all your software as there’s a few cool updates available.