Input XSS failing the Hackers Test

[eluser]Xeoncross[/eluser]
I just tried the input class and I was surprised that it failed MANY TIMES on the Hackers XSS cheat sheet. FF 3 and Chrome didn't register the attacks - but IE 6 did. IE 6 is still very much in use so I don't know why this class hasn't been patched...?

Code:

//http://ha.ckers.org/xssAttacks.xml
print $this->input->xss_clean($text);

http://ha.ckers.org/xss.html