underglass - 8:38 pm on May 2, 2011 (gmt 0)
Now if you had like 10 sites doing that to you, I would take some action.
Nope, none of that.
I would, though, do a more thorough backlink analysis of your site, including looking at all of the anchor text of the links, to make sure that there's nothing else there that looks "unnatural".
Thank you everyone. You put my mind at ease.