Avoiding URL Forbidden Characters By Using urlencode()?

[eluser]Matt Egan[/eluser]
I realize this. But by using urlencode() my URL contains no restricted characters, yet Codeogniter is still telling me that my URL does contain them, technically, it does, but the characters are encoded. I do not want to allow any more characters, because there should be an easy solution to my problem, and I don't wan to give in and just allow some extra characters. Also, I am not a securty "expert" by any means.

Thanks again,
Matt