After installing the WYSIWYG module + CKEditor / TinyMCE (same result) all my paragraphs are blown away resulting in an uneditable mess. Can you give me a clue how to make it read my paragraph markup? Thanks
To solve that, you should make the CKEditor disabled by default. Then when you edit an page, Copy the existing text, enable the editor and Paste the text. Now you'll have well formatted html text.
Or you could try Wysiwyg Linebreaks module, it should do the job. I never tried it but maybe you'll be lucky :)