[eluser]JoostV[/eluser]
url_title() strips unwanted characters from your uri and converts it to lower case. It will save you from creating a uri that will throw a CI 'disallowed characters in uri' error.
Also, it's good to use a generic uri filter. This means there will be no surpises when you for instance have tp compare two uris, or use a segment value in your script.
