[support] TinyMCE problem - won't allow line breaks

Hello, I'm running drupal 4.7.3 on a redhat 4AS server with the latest version of TinyMCE. I'm having a problem with TinyMCE. In the editor, I insert line breaks and they look fine in the editor. But, when I save the page, the line breaks are missing. I edit the page, and they show up in the editor still, but not in the page once I save it. Any ideas what may be causing this? - jody