First, it can provide information you might not want others to have; second, it just plain looks bad; third, it does nothing to enhance the site user's experience; fourth and possibly most important, the irony is priceless! See attached .png image.
I already gave JP a heads up - I noticed that earlier as well.
The problem most likely stems from the fact that the PHPBuilder forums have some custom code IIRC, so a configuration change that may have been harmless for the other xx number of hosted forums doesn't appear to be as forgiving to this community. :o
