I just released a new version of Slate (1.1) with a few fixes. Here are the full release notes:
1.1 – 11/26/2011 – Fixed issue with Breadcrumbs not showing all pages in trail. Removed page-meta div from blog_entry.php and pb_post.php and incorporated it in the pagemeta.php file. Updated ProBlog page type (pb_post.php) with newest trackback area. Added style for layouts in mobile.css file – made it so layout columns go to 100% width when viewed in mobile browser.