So, I started up my game a few minutes ago, and saw that my sim's portrait graphic showed him something other than what I picked out for him. his everyday outfit and hair had totally changed. I went into the game, bought a dresser, and changed him back to his original look. He slept, went to work, and then came home with yet another everyday outfit. So far his sleepwear hasn't changed, and he hasn't been in athletic or swimwear yet. He does not have the insane or inappropiate traits. I have played sims that did, though, and even they didn't totally change their default looks, just did things like wear formal wear to bed and such.
Anyone else having this issue, or is it just a me thing?