roodle - 12:25 pm on Jan 9, 2006 (gmt 0)

I have a similar thing happen to me except they don't vanish completely, they become url-only and drop out of the SERPS. These are pages that were indexed normally in the past with snippet and everything. Nothing done on the site to provoke this. I thought it was to do with directory depth and linking (the pages in question are all in a directory below the root and weren't linked to directly from the main site-wide menu). Then I thought it was similarity of titles and meta tag text, so I changed those, but seemly no effect. Then recently, around Christmas (I think there was some kind of update?) the site was "back to normal" with all pages properly indexed. I'm still none the wiser really...