I have noticed on new installs a question called "Joined date" but on my install that is not present.  I am wondering on an update did my site miss something in the past.

Is there any way to check an install against a base install to make sure it is all ok?   Like a database comparison?  A script could show the differences and from that action could be taken to rectify the problem.  This "question" in the profile question area isn't configurable so I assume it is a system setting!