I have WP-Super-Cache installed on a fresh install of WP2.5 on a NEW dedicated server from RackSpace. That being said. When I install Simple Pie Core so that I can use Simple Pie plugin for RSS and Atom feeds, it causes my pages to display xhtml in the browser. It changes the mime type of the cached files to text documents I think. If I turn the cache off, the pages load fine. If I Deactivate the Simple Pie Core, it works fine. I wanted to try turning off the Simple Pie Cache, but the variable won't stay turned off. Even if I hardset it in the db. I would very much like to use Simple Pie, but caching my pages takes precedence. Any ideas?