Database error?

I’ve just tried to get to my blog, and have got a more or less empty blog, with the error message:

WordPress database error: [Got error 28 from table handler]
SELECT DISTINCT * FROM wp_posts WHERE 1=1 AND post_date_gmt <= ‘2006-02-09 10:37:59’ AND (post_status = “publish” OR post_author = 1 AND post_status != ‘draft’ AND post_status != ‘static’) AND post_status != “attachment” GROUP BY wp_posts.ID ORDER BY post_date DESC LIMIT 0, 10

Does that indicate that the server with the database on is poorly? (The only thing that’s on the site are things like the sidebar, which aren’t drawn from the database.) It was working fine earlier this morning.