On Wed, 19 Sep 2007 13:22:56 -0300, Alenônimo <alexandre at alenonimo.com.br> wrote: > I've found the culprit: *Google Sitemaps* plugin. > > I've made an search for post2cat on all files within > /wp-content/plugins/ and it show up. Disabling it solved my problem. See <http://codex.wordpress.org/Plugins/Plugin_Compatibility/2.3>.