Compiling mime-magic into php

I'm trying to get the Horde project installed on my YellowDogLinux 2.2 system and am having a terrible time. The latest CVS versions of Horde require that php have mime_magic. I can't get it to "take" in php. Anyone have experience with this? I'm doing all the normal stuff. In configure, I use --enable-mime-magic and it has no complaints. On the other hand, I can't see in the output any references to it (although I might have missed something and don't know what to look for). There is no section for mime_magic in phpinfo() once installed. I have mod_mime_magic loaded in apache, FWIW. I have an entry in php.ini for: mime_magic.magicfile = "/usr/share/misc/magic.mime" although I'm not sure the syntax is correct or if the line needs to be at a specific location in the ini file. I have verified that magic.mime is where I say it is. If someone has an easy answer that's great; I would also like to know just how to diagnose problems like this. Ideas? Rob