pattern-fitting normalizations problem

Hi all!

I have a pattern-fitting normalizations problem.  If I have something like this:

        <category>
                <pattern>I AM *</pattern>
                <template>Hi <star/></template>
        </category>

and write "I am Boris%&#", interpreter sends me back "Hi Boris%&#"?!  Shoudn't interpreter send back only "Hi Boris", without nonalphanumeric characters?  Interpreter is PyAIML.