FWIW, I haven't had any trouble using the Clothing tool, either (yet).  It even utilizes the new interface for changing clothes!

Well, I just had it the other day, but I know what caused my problem.    I had reinstalled my game for fun, and when I did, I said "Oh look, all the cute little Maxis fixer-uppers are back in the house bin!"  I placed them all and decided that's what my new sims have to start out in...well, I neglected to consider that those houses are ORIGINAL Sims 2, so they pre-date Uni and the patch.  Not a problem at the first since it was an empty neighborhood, and I had to upgrade the sims after placing them on the lot.  The "downgrading" happened when I tried to move my couple into a larger home so they could start a family--they had already been upgraded and can't be placed into a pre-patch house.  They lost want slots and wound up with blank slots.   Ergo, I had to kill them off and pray that the contamination doesn't spread.

I thought I read somewhere around here that it was also caused by contamination from the remote controlled car?

Hmm, my nannies use the toilet.  They DON'T leave after their shift, but I use Inge's teleporter shrub to "clear off" non-residents and that takes care of it. 

Grits are yummy, especially with plenty of butter and pepper. 

My stepsister came from Long Island NY and I'm from Georgia. We'd constantly debate the "correct" terminology--she'd get on line at McDonalds and I'd get IN line at McD's and online on my computer .