The URI you submitted has disallowed characters.

[eluser]drewbee[/eluser]
The URI you submitted has disallowed characters.

I know where the configuration is. That is not an issue. Where is the actual validation and runtime checking being done at for this? I want to display a error 404 anytime this (and if there are any other areas that throw these random error messages). I am just praying this error is thrown through some type of global error function.

Any insight to the location of this?

P.S. The default 404 error pages, while a bit of hacking needs to be done to make them work with the rest of the site fluently... still look decent out of the box. Whats up with these sexy black & white error messages?