As you know, Wikipedia nofollows all their external links, so links from Wikipedia should have no impact on your rankings – be it positive or negative.
A WebmasterWorld thread have some SEOs disagreeing with that.
Some are saying because there are so many Wikipedia scrapers out there, when you get a link from Wikipedia it can hurt you.
A Junior WebmasterWorld member explained his case:
I guess if the scraper remove the nofollow and if the site has very other links to it, outside of the scrapers, I guess it can hurt.
But this all seems a bit farfetched and I suspect there is some other issue.
Forum discussion at WebmasterWorld.
