Google ignores "nofollow"?

The other day I thought to take a look at the Google Webmaster Tools section. I suddenly saw four errors in the “Not Found” section. The errors were pages that “nofollow” links were linked to them. How can it be? I remember Cutts saying that Google’s crawlers reads the attribute and they ignore the link. As a conclusion, spam does work and for all the SEO out there: continue with comments-link-building-nofollows!