I'm trying to display an iframe (google maps) on my node. I allowed "iframe" with the "plain text" format and unchecked "Display any HTML as plain text": http://www.diigo.com/item/image/fgah/3hc0?size=o
I select the text processing option "Filtered text (user selects text format)" for the field: http://www.diigo.com/item/image/fgah/dmeh?size=o I enter the iframe code with the "plain text" selection http://www.diigo.com/item/image/fgah/7svw?size=o The iframe renders fine.
I changed the text processing option for this field to "plain text": http://www.diigo.com/item/image/fgah/04e2?size=o
Now the iframe won't render (just shows the iframe HTML code). Why would it not work, isn't it the same "plain text" option?