This one's got me stumped. I was preparing to upgrade a site when I found that ONE POST from June 2008 which has 72 comments rendered a blank single page. All other posts are all right in respective single post pages. The affected post was about a small beauty contest which later became a bit controversial when other beauty candidates who lost ranted in said post ...
That post's title, thumbnail, author link show up in site's sitemap.xml, in the category, tag, sitemap and archive pages plus in list of top 10 most commented posts. But when I click on the link to the post from above-mentioned pages, the post page is blank. Source view shows from top to bottom: Doctype to <title>, <metas>, and all <link>, scripts rendered from wp_head, are there but then goes straight to </body></html>. There is no closing head </head> nor opening <body> nor content, nor sidebar nor footer info. Changed theme to default theme and a blank page is rendered for the post with basically the same source with no </head> <body> content, sidebar nor footer info. Like I mentioned before, only this post is affected as such.
Went to Post > Edit and in panel, I can open the post and see the post in the text area, categories are checked and tags are present and comments are shown below the panel. Republished post, cleared cache and cookies, and the post page is still blank screen.
Doubled-checked database xx_post, xx_comments and xx_postmeta and the post, comments and meta are there. Checked xx_options table to check the usual culprits for hacks but none found.
Exported XML of the site, and imported to XAMP on USB drive with WP 2.7.1 including theme and all plugins used activated with same settings. The single post page shows the post and comments but the comments_number renders "No Responses" while there are 72 comments below it. All other imported posts show the correct number of comments in respective single post pages.
Any help would be appreciated.