Does anyone know of an instance where the default XSS filter included with CodeIgniter has failed?

[eluser]timtocci[/eluser]
I've used HTMLPurifier with other (non codeigniter) projects and had great results. Thing is that HTMLPurifier has a big overhead. Since CodeIgniter has a filtering built in I've never thought about using anything else. Recently, I've noticed a few wiki entries about using the HTMLPurifier system with CodeIgniter. That's why I ask the question: Does anyone know of an instance where the default XSS filter included with CodeIgniter has failed? And if so, where and under what conditions?

[eluser]CroNiX[/eluser]
Never heard of it happening, but I'm interested if others have as well.

[eluser]InsiteFX[/eluser]
I never have!

[eluser]PhilTem[/eluser]
I never had any problems with the CI XSS-filter. But what exactly do you mean with 'has failed'? Failed by filtering too much or by filter too less? Just curious

If anybody else had failed experiences with CI's XSS-filter, I'd like to hear, too