Noel, first I created the blog. I then created a post. I logged out, created a new user, and created a post and comment as that user. As I was doing so, I noticed that the most recent post began to duplicate itself on the site's home page. By the time I refreshed the page or went to a new page, I had 25 copies of the same post with the same links to the same comments. When i would return to the page, the comments would be gone.
This is happening on two platforms and on three browsers. One platform is Mac OS 10.5.6 using Firefox 3.0.8 and Safari 4 (beta). The other platform is Windows XP using IE 7.0.5730.13.
It also happens on another site I created earlier: twelveangrymen.wordpress.com, as well as twelveangrymen1a.wordpress.com.
(I am at our school where I teach. The school uses an Internet filter to keep students off of harmful sites, but I guess that wouldn't be causing the problem.)