The "Build Profile" is so difficult for users to use that I have had to disable it!  Out of around 50 profiles, 2 of them had managed to get their profiles to display as completely blank (see attachment), yet did not realise that this was the case!  Neither did I until someone else pointed it out to me.

It should either be IMPOSSIBLE for the user to mess up their profiles this badly (e.g. a profile layout cannot be saved unless it contains ALL of the required elements - e.g. their photos, their text etc.), or it should be EXTREMELY OBVIOUS that there profile looks screwed up (e.g. Users are forced to verify before leaving that "This is what your profile is going to look like, are you sure?").

I have disabled this feature on my site, which is a pity, since I think it's too dangerous for users; it's a powerful feature, which I'm sure has had a lot of work done on it, but it lacks the fool-proof usability to make it usable by naive users.

(I've also currently disabled "Profile HTML" since I haven't got the faintest idea yet what that's for...maybe I will figure it out later, but if it's not obvious to me, it certainly won't be clear to users)

We already are working over this for upcoming update. There are will be two default required elements for profile build page: Profile Details and Photo Album.