I also got this doll from an "infected" lot from the Exchange, but it didn't cause any problems at all with my game. However, I deleted it (better safe than sorry), and I got the new, "fixed" version straight from Rebecah's TSR account. I also asked her about the situation directly, and she said she's had the doll tested and has been working tirelessly to figure out just what is wrong with the doll, and also mentioned that a few people (like Delphy, I believe) helped her test it after getting reports it was bugged.
What strikes me most odd is that apparently the doll had been up since February, and she didn't get any comments saying it was bugged until recently. I know a lot of people like to say these things just to cover their asses, but, I dunno. She DID fix the doll on her site, though, so that kinda shows she's making some effort to fix the issue? I think the only way the issue's actually going to get fixed, though, is to make everyone in the Sims community (which is a lot of freaking people) aware of the "bugged" doll, and if they really like it (I personally think it's a cute toy for Sim toddlers), they can download the fixed version from TSR. However, it's hard to get to 50 trillion (okay, that's exaggerated, but I have no clue exactly how many people realize this is a problem) people and get the information spread over such a wide network. :/
I've seen a lot of topics on the subject, and I agree it is a reason for concern, whether it is a mistake on Rebecah's part, or some other strange occurrence (I personally think perhaps someone messed with the original file and then uploaded to the Exchange in the hopes of sabotaging EA and the Exchange? A lot of people seem to be very against the Exchange, from what I've seen, so interwebz warfare seems highly likely.), but a lot of times everyone's just pointing fingers and playing the blame game...Really not the way to fix the situation. The only way this can get fixed is through awareness and caution, kinda like an internet STD.
I, personally, won't be using the Exchange anymore, except to upload random Sims if I feel like it. I recommend everyone else does the same. (All I'm gonna say...Excuse the rant. ^ ^; -Whew-)