chrisv1963 - 8:50 am on Apr 6, 2013 (gmt 0)
Google should know better as Pinterest, being primarily a mashup, primarily isn't original content.
This is really the core of the problem! Google should never rank Pinterest boards! Google says (See the webmaster guidelines) that we should create original content to get our sites ranked, but at the same time Google ranks Pinterest content.
After panda and Penguin it might be time for an Antipining algo update.