I've seen this on a few d's over the years, and the other day I noticed my car has a case of the 'grins' as well...
If you look at my car at an angle from a distance, the front AND rear fascias seem to have a slight bowing effect in the center, causing the bumpers to look like they are sagging in the centers. I also noticed that along the top of the front fascia, it seems to have a slight sag in the middle as well.
Im not sure if this is because the car sat outside unattended for so long before being taken care of or what, but it is noticeable to me.
Has anyone ever done any reinforcing to correct something like this, sorta an eyebrow fix on a larger scale?? Eventually I would like to make them straight. Minus the bowing, my fascias are in great condition and the p.o. had a great paint job put on them. I would just like the sags to be outa there.