Do robots.txt disallowed pages still leak PageRank?

Followup to Matt's nofollow comments

[peterdaly]

Matt's comments make it unclear to me whether links to pages that are disallowed in robots.txt leak PageRank.

Understanding that every link on a page gets a portion of the pagerank that can be passed, does linking to a robots.txt disallowed destination essentially decrease the number of links on the page by 1, BEFORE the PR distribution calculation is done?

Are there reference articles and/or comments from Matt that people can point to that reinforce how this works?

[Tonearm]

I'm curious about this too as it relates to <meta name="robots" content="none">.

[koan]

I'm also very curious about this. You would think links to pages blocked in your robots.txt wouldn't be included in your PR distribution, it does sound logical, but that doesn't mean that's how it works.