These glitches are getting old fast. My latest one came when I tried to save my game this morning before going off to work.
I used the 'save' option as I usually do, and then had to get out, as it was virtually right on the dot of when I had to leave. When I got back (about 1/2 an hour ago) it was STILL on the save screen, which I thought was weird. The computer had also completely frozen, and nothing (not even alt-tab [to switch between bottom of the screen tabs] nor ctrl-alt-del [to bring up the task manager]) worked. So I was left with turning the computer off and on again and hoping that the game had saved itself (which it had done previously when something similar had happened).
On re-opening the Sims 3 and going to the saved game screen, I discovered that no, it hadn't saved itself, and had reverted to the last saved instance of that file. That was back when Yumi was still alive and Majel hadn't learned her essential toddler skills (let alone her xylophone skill).
So, am I free to continue playing this one, or would it be best to restart?