RewriteRule ^user/(\d+)$ index.php?action=userbyid&id=$1 [L,QSA]
RewriteRule ^tags/?$ index.php?action=tag [L,QSA]
-RewriteRule ^tag(/(.*))?/rss$ index.php?action=tagrss&tag=$2 [L,QSA]
+RewriteRule ^tag/([a-zA-Z0-9]+)/rss$ index.php?action=tagrss&tag=$1 [L,QSA]
RewriteRule ^tag(/(.*))?$ index.php?action=tag&tag=$2 [L,QSA]
RewriteRule ^(\w+)/subscriptions$ index.php?action=subscriptions&nickname=$1 [L,QSA]