Version 1.27 of The Sims 3 contains the following:

Addresses some issues with Speed 2 and 3 moving too slowly. Some machines will have better results when using Speed 2 and 3 now.
Fix to story progression on/off selection toggle.
Fix for a possible crash with audio code.
Fix for babysitter routing off lots with babies.
Addresses some issues with Vsync and refresh rate problems.
Addresses some issues with DVD authentication errors and drive compatibility on startup.
This update deals with some issues on Mac systems that can crash the game while connecting to AFP servers.
Fix for a freeze that can occur when Sims attempt to clean out bad food from the fridge.