Note the upgraded forum! If you are experiencing issues logging in, you may need to reset your password which should send an email. If the email doesn't arrive, be sure to check your spam folder just in case.
I've hit a problem with iframes and CKE that I've not encountered before.
CKE is configured with the Oembed plugin, which usually does a good job of embedding iframes. This works fine in CMS pages, and the Fuel Blog module, and works on insert into the WYSIWYG in an advanced module, but when saved it converts the iframe to entities.
What might the advanced module be doing that the Pages / Blog one isn't?