deadsea - 1:51 pm on Dec 21, 2011 (gmt 0)
If google sees duplicate links on a page, one of which is nofollow, and one of which is dofollow, it treats BOTH as if they were nofollow.
My testing has shown that Google ignores duplicate links for pagerank and anchor text purposes. Only the first link actually counts. If you nofollow the second one, then the first one doesn't count either.