What is your base game version right now ?
To find out, open your launcher and hover over the little base game icon in the lower left part of the launcher. It should say 1.50.
More Details can be found here: http://sims3.crinrict.com/en/2011/01/tutorial-how-to-find-your-game-version.html
For Macs: http://bluebellflora.wordpress.com/the-sims-3-on-a-mac/checking-which-patch-version-youre-running/
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For PCs there's usually also a log that can be found in documents/electronicarts/thesims3 and is called Sims3LauncherLogFile.log
Post the content here if you have that too.
Sorry for the delay, but EA did not send any email notification that you ahd replied. Also don't know why I have 2 accounts here...
Anyway - followed instructions on finding version numbers:
The Launcher window says 3.12.8.011031 in the lower left area, and when I mouse over the base game it says "The Sims™ 3" in the pop-up field.
Digging into the info files burried in the game packages gives these versions for the base & the two expansions:
TheSims3.app/Contents/info.plist:
...
<key>ClientBuild</key>
<string>1.22.9.011001</string>
...
The Sims3.app/Contents/Resources/AddOns/The Sims 3 World Adventures.app/Contents/Info.plist
...
<key>ClientBuild</key>
<string>2.16.6.010031</string>
...
The Sims3.app/Contents/Resources/AddOns/The Sims 3 High-End Loft Stuff.app/Contents/Info.plist
...
<key>ClientBuild</key>
<string>3.12.8.010031</string>
...
The Launcher does not indicate any updates are available.
