.htaccess is not correct if use custom 'Cache folder' from plugin settings:
Cache folder:
/tmp/lite-cache
Generated .htaccess:
RewriteCond /tmp/lite-cache%{REQUEST_URI}/index.html.gz -f-->
RewriteRule ^(.*) wp-content/cache/lite-cache/$1/index.html.gz [L]
Plus #BUG2 from this topic http://wordpress.org/support/topic/htaccess-is-not-correct?replies=1