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This is a bug with Linkscape and OSE, and has nothing to do with Google. In short, Linkscape gets confused when it sees binary files and has wrongly said they are links. We're fixing this problem and it's decreasing with each crawl (you should see fewer of these tomorrow after today's crawl has been released). The other regular links you see are valid. If you'd like, you can email help@seomoz.org and our help team will help you out as well. I would wait until tomorrow though, when the fresh crawl is available and you have the most current stats, and fewer of the bogus links.