Let's say I go through and re-categorize all of the posts in a client's blog, nest some of them under parent categories. And the Breadcrumbs NavXt plug in "parses" the categories (example using Bruce Clay's several years old explanation of site siloing: peanut butter>crunchy peanut butter>creamy peanut butter>crunchy>salted peanut butter>crunchy>low sodium etc) Then... maybe if the above is working, would it be "duplicate content" to also have the nav buttons be <home> <about peanut butter company> <crunchy> <creamy> ??? My question is: Does having the breadcrumbs function in this fashion in an effort to "site silo" be either: A) unnecessary to also have the Nav buttons perform this function B) would it be considered duplicate content and draw the ire of the Penguin Update? PS - I posted this same question on the WarriorFourm but lately haven't been getting quality answers there