As to the strange mouth issue, is this the one where even when the sim is joking and/or laughing the mouth no longer animates but stays in the spastic, half-frown novocaine freeze?
Yeah, that sounds like it. It's happening a lot and it drives me nuts. Sometimes it happens with the mouth open like they're shocked and that's the one that sticks until I delete the sim with moveobjects on but they also do this thing where their mouth is shut, but one corner keeps going down like they're frowning. They tend to do it on and off all the time but it never sticks. I'll try to get a pic of that and the head tilted down problem tomorrow when I start my game up again.
I don't think it's a problem with my RAM (I have 2 GB) or my video card (Radeon x1900). But I do have issues with my processor since it's a dual core. Each core is only like 2.2 GHz and the first core tends to be all the way used up after playing my game for awhile until the game eventually crashes or runs so slow I can't play anymore.