OH I would love this.  My female sim caught her husband cheating so she slapped him.  It was kind of disconcerting when he slapped her back.  But other than that, I love this mod.

I finally fixed it.  I hope it can work for you.  It actually turned out to be a simple solution for me.  Anyway, I took the advice of what the people said on here and it worked.  I went to Graphics/Performance Options and changed Sim Object Detail to High.  I made other changes in there but it didn't effect the way the sims faces looked.  Anyway, when I went back to the houses that were messed up, the faces were the way it was supposed to be.  Here's a picture of what you should try and change.  Good luck!!!

Freaky_Kitty:  Yeah, I went ahead and reinstalled Seasons since it didn't seem to make a difference.  It really sucks because the sims in question are sims I made of my family so to see the faces get distorted really bothers me.  And you're the first person besides myself that it seems to have happened to so the odds of finding a cure seem small.

I'm so glad I found this thread.  I'm having the exact same problem.  Everything was fine until I installed Seasons.  I even went and uninstalled everything and reinstalled all the expansion packs.  The weird thing is that NOW it's even happening with Seasons uninstalled.  And I know for a fact that these skins were working before then because these are the same sims I use all the time.  Hopefully some kind of solution can be found.