Dots in url segment causing weird behaivor

[eluser]ranjudsokomora[/eluser]
cyberjunkie,
I believe what is happening is that your server is using ./index.php as a 403.
Adding "..." to the URI will result in one of two things happening.

1) The browser will try to change the folder handle and go up one or two directories
2) In the case of Apache Web Server "(20024)The given path is misformatted or contained invalid characters"

I would not recommend placing dots in the URI unless it is for the url suffix and then only one dot is required.