Last modified: 2011-05-12 21:49:09 UTC
All of the population density values for regions have the wrong square km to square mi conversion applied. The conversion factor is applied to the wrong side of the equation. Example: http://en.wikipedia.org/wiki/San_Diego,_California
Not a mediawiki bug. Please complain to the folks at http://en.wikipedia.org/wiki/Talk:San_Diego (That's probably not exactly the right place, but they'll be able to direct you)