OldFatGuy: This has been happening to me frequently. Once a couple weeks ago, I was trying to edit a post and tried over FIVE times, yet each time I hit "Post my message" the same old, unedited post would remain. So it's happened trying to post a new post, as well as trying to edit an existing post.
Usually it happens to me when I try responding to someone.
(The irony right now is sickening)
It just doubled.
Cock, this just happened to me in another thread, now that's just plain ironic.