Edit: Apparently EA backed down on this.
Being blatantly promised features and then denied them. Oh, you guys wanted to have different user accounts for your family? Pfft, you should each buy a copy!
And, as usual with so many bits of software, if it doesn't work, most stores won't let you return it. Le sigh.
In brighter news, more DS games to order! Not only will they just plain WORK, but I can resell them for a fairly high proportion of cost on ebay when I'm done!