I am new to Umbraco, and was hoping someone might quickly know what is causing the following issue.

We have a custom 404 handler made that inherits from INotFoundHandler - it worked great until today when we tried a url containing a '.' (full stop). It passes over the 404 handler and displays a plain white page. It's clear Umbraco processes these queries that contain full stops differently and was wondering if anybody could help us get them working like any other 404?.

Here is an example of the issue:

> http://site.com/test   (works great..)

> http://site.com/test.abc  (does not work, does not hit the 404 handler)