Rosalind - 1:27 pm on Nov 28, 2012 (gmt 0)

thousands of links pointing to my site that render 404 errors because the pages don't exist

I've noticed this, although not in the thousands, and for me it's recent. It's my understanding that it's easy for search engines to look at a site that mostly points to 404s and label it junk, so for now I'm just keeping an eye on it.