WARNING: Duplicate Meta Descriptions and Title Tags when Paginating
Although the WordPress SEO plugin was mentioned by Matt Cutts (Google spam team) has having implemented rel= “next” and rel =“previous” elements, it does not adhere to unique titles & descriptions when you paginate.
This means that if you break a long post into 3 pages (<!—nextpage-->) i.e
example/3/
example/2/
example/
Yoast’s plugin will display the same title and description across all pages and Google will penalize you for duplicate content.
If you have paginated posts, check your Google webmaster account HMTL suggestions.
The issue of duplicate content when paginating has been discussed in detail by a Google employee here.
http://www.google.com/support/forum/p/Webmasters/thread?tid=344378292ff91e8d&hl=en
Ultimate SEO has already addressed this by adding page number after title and the description when you paginate.
Yoast should address this and fast!