Since HTML::SimpleParse now handles case-sensitivity correctly, we need to be a bit more careful in this module. If you're using HTML::SimpleParse version 0.09 or greater, you'll need this here version (1.13) of Apache::SSI or greater if you want SSI to work.
Improved the error message you get when there's no 'file' or 'virtual' attribute of an <!--#include--> tag.