I'll try to cover all the pertinent details here.
I have EP01/02 and SP01 installed. I was able to play perfectly normally for a couple of days, save files .. no problem.
About 2 days ago, any new save games stopped showing up.
I deleted the old save games that I wasn't using any more.
Now when I start TS3, I only have the option to start a new game.

Things I have done so far:
Reinstalled completely and totally.
Removed all CC.
Started new game, saved and returned to main menu (still new game only)
Tried restoring a .backup of a save game.
Deleted the 4 cache files in mydocs///sims 3.
Bypassing the S3Launcher and running TS3EP02.exe straight.
....
The game seems to refuse to acknowledge that they may even be save games. I don't know if they're all corrupt (though I put them on a thumb drive and can load them on my laptop no problem, so that kind of lends support to the idea that they are not corrupt.)
...
N.B.- Exported Sims and Lots are still viable. I.e. when starting a new game, I can choose any of the previously made households as a family without any issues, inc. those with attached houses.

Are all these save games using the same 'hood? I've had this issue with various custom towns that the game just doesn't seem to like.

Riverview... its the only town I really like the layout of. Do you have some theories on why it's doing this in particular?
I did a little testing after you made me realise that they were all the same town, I can see saves from Sunset Valley, and can fake in the Riverview saves there, and it works just fine.. it's still annoying but at least I have a way to get to them.
The games save alright and *can* be loaded, but this is still an issue I'd like to figure out right proper.

Last edited by rakutenshi : 11th Jun 2010 at 12:48 PM. Reason: addendum

Arrrrrrgh... the cursed Riverview! *shakes fist*

I couldn't find my problem searching before, but with a little direction (i.e. specifying it down to riverview saves specifically rather than any saves) it seems the problem's been solved.
(delete the riverview.world from the installedworlds folder in the mydocs///sims3)

Thanks for posting back with a solution that works for you.

Thread locked.