More aesthetic than anything.
The banner under a question which states: "Know someone who can answer? Share a link to this question via email, Google+, Twitter, or Facebook." is currently a dark background with reversed text.
This is exceptionally visually prominent in the design. I feel a lighter, less obtrusive color may serve this banner area a bit better.
The dark background works very well at the bottom of the page, it's this mid-page banner which just yanks your eye to it in a drastic fashion.
For what it's worth, I think perhaps the teal background used for the "community Bulletin" on the right side may be a better background color for this banner area - still prominent, but not as visually striking.