Hi Philip sorry for the slow reply. Tomcat 6 and earlier has a setting to turn off caseSensitivity but it has been removed in Tomcat 7.
http://tomcat.apache.org/tomcat-6.0-doc/config/context.html#Standard_Implementation
Tuckey would allow to ignore case sensitivity as the [from] element has a casesensitive attribute that is by default set to off. Maybe something as simple as the following may work?
(replace the square brackets with pointy brackets)
[rule]
[from]$1[/from]
[to]$1[/to]
[/rule]