<IfModule mod_deflate.c>
        <IfModule mod_filter.c>
                # these are known to be safe with MSIE 6
                AddOutputFilterByType DEFLATE text/html text/plain text/xml

                # everything else may cause problems with MSIE 6
                AddOutputFilterByType DEFLATE text/css
                AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript
                AddOutputFilterByType DEFLATE application/rss+xml
                AddOutputFilterByType DEFLATE application/xml

                # CUSTOM
                AddOutputFilterByType DEFLATE application/xhtml+xml
                AddOutputFilterByType DEFLATE application/rss+xml

                AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
                AddOutputFilterByType DEFLATE application/x-font
                AddOutputFilterByType DEFLATE application/x-font-opentype
                AddOutputFilterByType DEFLATE application/x-font-otf
                AddOutputFilterByType DEFLATE application/x-font-truetype
                AddOutputFilterByType DEFLATE application/x-font-ttf

                AddOutputFilterByType DEFLATE font/opentype
                AddOutputFilterByType DEFLATE font/otf
                AddOutputFilterByType DEFLATE font/ttf
                AddOutputFilterByType DEFLATE image/svg+xml
                AddOutputFilterByType DEFLATE image/x-icon

        </IfModule>
</IfModule>