deadsea - 8:17 am on Apr 14, 2011 (gmt 0)
href="#" do NOT increase the divisor, pr DOES get passed to other links on the page. This appears to be a special case. href="#offset" does increase the divisor.
Another common "null link" pattern behaves the same way:
It does not pass any pagerank, nor reduce the amount of pagerank available to other pages.