Well I found some more information on it.
http://www.ghacks.net/2009/02/02/wordpress-your-attempt-to-edit-this-post-has-failed/
I did that and I am not having that problem anymore. But I don’t have the autosave working anymore. Maybe someone will see this and figure out what the bug is.
I have gone back to Firefox to edit my posts. I have the same problem with Safari 4 in adding a link. It just all darkens and I can’t do anything. I’ll try again later.