Rich text editor Redactor adding additional paragraph p tags
http://imperavi.com/redactor/docs/settings/clean/#setting-replaceDivs
http://imperavi.com/redactor/docs/settings/clean/#setting-removeEmpty http://imperavi.com/redactor/docs/settings/clean/#setting-paragraphize

Standard.json

{
    buttons: ['html','formatting','bold','italic','unorderedlist','orderedlist','link','image','video', 'table'],
    plugins: ['fullscreen'],
    toolbarFixedBox: true,
    paragraphize: false,
    replaceDivs: false
}


Edit: This bug also happens in the most recent version of Redactor as seen on their example page.