I’m noticing the same thing happening. I’m working off of a fresh install of WP 2.1.2, and as I tweak things, I occasionally add a test post to see the result. The trick mentioned above (Edit the post, and delete it there) works, but it is awkward and totally non-intuitive. I wouldn’t care so much for myself, but I’m designing the blog for another to write in, and my goal is to make his writing experience as hassle-free as possible.
A fix on this would be appreciated.