Amongst the recent topics tagged search there was a puzzle, possibly involving private bookmarks, but from http://www.diigo.com/user/Lamarck/dna i see that your bookmark of DNA from the Beginning is public.
Try repeating the search periodically, occasionally, until the bookmark is found amongst your bookmarks…
When I search about "DNA" in top-right search box...Look: http://www.diigo.com/search?adSScope=diigo&what=dna
Here is what I see in my screen
http://img32.imageshack.us/img32/2048/expecting.jpg
When you search http://www.diigo.com/search?what=DNA%20from%20the%20Beginning the result in everyone's bookmarks
http://www.diigo.com/people/search/url?query=http%3A%2F%2Fwww.dnaftb.org%2Fdnaftb
differs from the page with the same name that you bookmarked
http://www.diigo.com/people/search/url?query=http%3A%2F%2Fwww.dnaftb.org
Amongst the recent topics tagged search there was a puzzle, possibly involving private bookmarks, but from http://www.diigo.com/user/Lamarck/dna i see that your bookmark of DNA from the Beginning is public.
Try repeating the search periodically, occasionally, until the bookmark is found amongst your bookmarks…