If you have installed the WYSIWYG module with TinyMCE Editor, you will find that it does not support the iframe element. Say if you embed a Google Map in the HTML body, it will disappear once you edit the node.

Ya, it’s Google again, i found a post written by Sam Michel who resolve the problem just by simply create a custom module with the hook_wysiwyg_plugin. Continue reading Drupal – Add iframe in TinyMCE Editor →