An invalid character was found in text content. (OT)

Ok, so I'm finally tired of getting an IT call every time someone
pastes special characters from word and submits them. Is there a
wholesale XSL way of getting rid of this problem in MSXML?

My scripts do replace characters as needed, but if there's a better
solution besides updating the character cleansing/stripping function
every time, I'd like to hear it.