This is exactly my problem. Should I restart the game after I save it as a different name? I don't want to save my game and then never have the problem fixed.
try using "save as" and renaming the file instead of regular save. using regular save overwrites your old game and could be come corrupt. "Save as" gives you a new save rather than overwright the old save. Try cleaning out your cashe files. Its possible you have a corrupt save. Check your saves folder in documents, Electronic Arts folder, to the sims 3 folder, to the saves folder. If you have any saves with "Bad " on the end of those get rid of them. In general if you ever get an error while trying to save it will give you a save with "Bad" on the end of it.
