[Plugin: W3 Total Cache] inconsistent / not working – WPMU?

I’m currently trying to run this plug-in on a WPMU site. The site is setup on a virtual server, so I have APC running. So I’m feeding all the pages and database caching through APC. However, I get very very inconsistent debugging information.

1. It only shows debug information on the home page
2. The home page shows:

   <!-- W3 Total Cache: Page cache debug info:
   Engine:             apc
   Key:                w3tc_65a12d8ad523696a28266807e817a5b8_page_6666cd76f96956469e7be39d750cc7d9_gzip
   Caching:            enabled
   Status:             cached
   Creation Time:      0.003s
   Header info:
   X-Powered-By:       W3 Total Cache/0.8.5.2
   Last-Modified:      Fri, 07 May 2010 15:44:04 GMT
   Vary:               Accept-Encoding, Cookie
   Pragma:             public
   Expires:            Fri, 07 May 2010 16:44:04 GMT
   Cache-Control:      max-age=3588, public, must-revalidate, proxy-revalidate
   Etag:               2cf2d8fce2d364a02c401f393b82ab0d
   Content-Encoding:   gzip
   X-Pingback:         http://site.com/xmlrpc.php
   Content-Type:       text/html; charset=UTF-8
   -->

   all other pages show:

   <!-- Performance optimized by W3 Total Cache. Learn more: http://www.w3-edge.com/wordpress-plugins/
   
   Minified using disk
   Page Caching using disk (enhanced) (user is logged in) ...

   you can see right away that something is funky cause:
   a. it’s not outputting all the debug information (if it’s supposed to)
   b. it says it’s using disk caching when I specifically told it to use APC (as seen on the homepage)

Other things to note, I am using the development version (as I saw you recommended that a few times), I’ve done a complete uninstall and a clean install and I’ve also tried to use the disk methods. And it will only write the homepage to the pgcache folder. With W3Cache activate I’m not able to activate any other plugins site wide. I have to disable it and re-enable it so I can activate other plugins.