One of the quirks of the old version of Pivot I used to run was that it generated its RSS and ATOM feeds as static XML files with the names /rss.xml and /atom.xml, respectively. Since upgrading to PivotX, which implements these news feeds in a standard fashion (i.e., with the URLs /rss and /atom) with some URL rewrites, everyone who was using the URLs generated by the old release was left out in the cold. I've been trying to set up mod_rewrite to transparently redirect requests for the old feeds to the new ones with an HTTP …