Game update 1.50

To install this update, please start your game and use the “Updates” tab in your Launcher.

This game update includes the following changes:

Free Sims 3 Base Game Content

Sims can now dumpster dive from the Commercial Dumpster pre-placed in Sunset Valley and find cool items including furniture and collectables!
New air conditioning units and electrical box decorative objects.
New Terrain Paint for Build Mode.
A new traffic light for Create a World.

Base Game Updates

Sims, cats, dogs, and horses will animate properly rather than sliding into position when performing social interactions.
Sims will no longer occasionally flip or stutter when trying to walk through doorways.
Gifts sent by invalid NPC Sims will no longer cause the mailbox to become unusable.
The Fog Emitter that came with The Sims 3 Ambitions has been updated to transition properly to the new base game Fog Emitter object. Any lots created with The Sims 3 Ambitions fog emitters that were installed since the release of The Sims 3 Seasons will have to be reinstalled for the emitter effects to play properly. There is no need to re-upload any content to The Sims 3 Exchange – all content created with either The Sims 3 Ambitions fog emitter or the new base game fog emitter will work properly when installed after this update is applied.
The Fog Emitter is once again moveable once placed in the world.
Placing blueprints on foundations can no longer cause the game to crash.

Read more at The Sims 3