hi bernd,
i was just about to post this as well ^^ i have a veeery long page and it seems Redactor (wysiwyg) does not brake lines (HMTL mode)
also, the Redactor toolbar does not change its position to fixed when i scroll down in my very long page (WYSIWYG mode), meaning, i have to scroll a lot so i can set an H3 or text in bold