Text coming back formatted different.

[eluser]Aken[/eluser]
I haven't used it yet, but this jQuery WYSIWYG editor looks very promising: http://redactorjs.com/

I don't know how much that would affect the actual resulting code or not - something tells me none of them will ever be perfect. But maybe it does a better job.

Otherwise like I said, you could consider different markup options, like BBcode or Markdown or other similar text-based ones that don't require HTML tags at all. That way XSS Clean will never be a problem.

There are articles out there for handling HTML in POST, and protecting against various things. Here's something that might be handy: http://htmlpurifier.org/