Rich Text - Redactor doesn't allow iframe even when in allowedTags config setting I've updated my craft/config/redactor/UserContent.json settings with allowedTags containing iframe but iframe tags are stripped on save. 

Other added allowedTags seem fine and iframe works on paste and initial editing, just not after saving.

Running Craft Pro 2.4.2679

I see there were issues with this for older versions of Redactor but they seem to be resolved. Any ideas about how to fix this?

Here's my UserContent.json:

{
    toolbarFixed: true,
    buttons: ['html', 'formatting', 'bold', 'italic', 'underline', 'deleted', 'horizontalrule',
              'unorderedlist', 'orderedlist', 'alignment', 'indent', 'outdent',
              'link', 'image', 'video', 'table'],
    removeEmpty: ['p','strong','em','span','a'],
    cleanStyleOnEnter: true,
    plugins: ['video', 'table'],
    allowedTags: ['a', 'abbr', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'blockquote', 'br', 'button', 'canvas', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'del', 'dfn', 'div', 'dl', 'dt', 'em', 'fieldset', 'figcaption', 'figure', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'hgroup', 'hr', 'i', 'iframe', 'img', 'input', 'ins', 'kbd', 'keygen', 'label', 'legend', 'li', 'map', 'mark', 'menu', 'nav', 'ol', 'optgroup', 'option', 'p', 'picture', 'pre', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'small', 'source', 'span', 'strong', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'textarea', 'tfoot', 'th', 'thead', 'time', 'title', 'tr', 'track', 'u', 'ul', 'var', 'video', 'wbr'],
}
If you can, update to the latest Craft build. There was a Redactor update in Craft 2.4.2682 back in July that updated Redactor and fixed issues with iFrames.