This is complicated, so I'll try to make it clear.
I made the mistake of hitting "blog this!" on flickr to get a photo from there.
The photo went instantly to my blog as a post. Seeing my error, I deleted the post immediately.
Then about an hour later I posted a new post to WordPress. Unfortunately, the deleted post is what is showing up on Facebook as the latest post. It is also showing up on a blog ring I am a member of. Both ignore the latest post. Clicking on the link to the post brings up the WordPress 404 error form.
What do I do so that the new post shows up? Pinging technorati hasn't helped.