[NiteWave]

RewriteRule ^test.rss http://www.google.com/ [L,R=301]
-->
RewriteRule ^/test.rss http://www.google.com/ [L,R=301]

this is the difference between per-server and per-dir rewriterule.
for further reference:
http://httpd.apache.org/docs/2.0/mod/mod_rewrite.html