config.allowedContent = true;
really affects. To do this try to insert the code with standard tools and switch visual mode to the source and back. If your code modified in the same way, that means that the option does not work (maybe syntax error?)
<link>
tag and your form seems to be styled as designed.
When I insert my signup form html code through source view then it works fine BUT when I insert the same code using the "Insert HTML Plugin"; then the plugin automatically remove link tags (along other tags) from the inserted html code, which results in broken signup form.
My current Ckeditor settings are:
Please reply at your earliest convenience.
Thanks,