argument with dot

[eluser]Louis![/eluser]
Hello everybody,

I have a little issue with an argument which contains a dot, for example :

http://www.example.com/galerie/delete/Desert.jpg

When i display the argument of the function delete i can see that the dot is transformed to an underscore, the value is : Desert_jpg

I don't think if it's a normal result, so if you can help me.

Thanks

Louis