I was just figuring how to lay podpress to sleep as I think it will not be updated any more. I was playing with podcast and looking at "enclosure" in the "custom fields". All of a sudden "enclosure" disappeared from the drop down in the "custom field" tab. I deactivated all plugins,and still not there. I reinstalled WordPress and looked for "enclosure" in "custom fields" before activating any plugins. Still not there. Any ideas where it might have gone?