A patch has now been released for The Sims 3, which you can download by starting the game launcher and selecting "Game Updates"*.
The change log is as follows:
- 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.
*Note: You will need the EA Download Manager installed to receive the patch.