I updated Mythweb to 0.27 and it broke! Well sort of….the mythweb.conf.lighttpd configuration file assumes you are doing a web root install but the port installs to /usr/local/www/mythweb, a sub-directory of the web root. I was getting a lot of HTTP 404 errors (dcss/video.css.php was the one that made me look at url rewrite). The solution for me was to tweak the lighttpd rewrite configuration.
$HTTP["url"] =~ "^/+mythweb/" { url.rewrite-once = ( "^/+mythweb/(css|data|images|js|themes|skins|[a-z_]+.(php|pl)).*" => "$0", "^/+mythweb/(pl(/.*)?)$" => "/mythweb/mythweb.pl/$1", "^/+mythweb/(.+)$" => "/mythweb/mythweb.php/$1", "^/+mythweb/(.*)$" => "/mythweb/mythweb.php" ) }
I also had to edit mythweb/includes/init.php as outlined at http://www.mythtv.org/wiki/MythWeb_on_Lighttpd#If_Mythweb_doesn.27t_display_correctly
BTW, my fix for video cover art still works!