Are you viewing the posts directly, or through a search link (like show all posts by a user). If the name has special characters in it, and you "show all user's posts" the body can get dorked up, or be missing. Verify that the post is really edited by viewing a post directly (without a "highlight" link in the URL.
Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.
Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.