Symphony.

My host told me that libxslt is installed at /usr/share/doc/libxslt-1.1.11/

But when I do a phpinfo (http://info.amitvaria.com/info.php) I don't see --with-xsl. Symphony tells me that I need an XSLT processor, and I'm not sure where the disconnect is. Any ideas?

If you don't see --with-xsl then the XSL module won't be available, hence they error. You'll need to ask your host to recompile/reconfigure PHP to have that flag.