Using the Dev version (as of last night ;) ).
WordPress 3.0, MultiSite, with BuddyPress 1.2.6 (I think? Whatever came out a couple days ago).
Compatibility Test Info:
Server Modules & Resources:
PHP Version: 5.2.13
PHP Timezone: OK
Web Server: Apache
FTP functions: OK
cURL extension: OK
zlib extension: OK
Opcode cache: APC
Memcache extension: OK
Mime type detection: Not installed
Hash function: hash
Safe mode: Off
Open basedir: On:
zlib output compression: Off
mod_mime: OK
mod_expires: OK
mod_deflate / mod_gzip: OK
mod_headers: OK
mod_env: OK
mod_setenvif: OK
mod_rewrite: OKWordPress Resources
/wp-content: Not write-able (note: it's set to 755)
/.htaccess Write-ableUploads directory: Write-able
WP_CACHE define: OK
Fancy permalinks: OK
Network mode: On
VHOST mode: Off
I get this from debug mode, however, which tells me that it's NOT being cached:
<!-- W3 Total Cache: Page cache debug info:
Engine: apc
Key: XXXXX
Caching: enabled
Status: not cached
Creation Time: 0.156s
Header info:
Set-Cookie: bp-message-type=deleted; expires=Wed, 08-Jul-2009 15:14:57 GMT; path=/
Last-Modified: Thu, 08 Jul 2010 15:14:58 GMT
Vary: Accept-Encoding, Cookie
Expires: Thu, 08 Jul 2010 16:14:58 GMT
Pragma: public
Cache-Control: public, must-revalidate, proxy-revalidate
Etag: XXXXX
X-Powered-By: W3 Total Cache/0.9
Content-Encoding: gzip
X-Pingback: http://jorjafox.net/xmlrpc.php
Content-Type: text/html; charset=UTF-8
-->
I made sure to test on a cache-flushed browser (chrome and firefox) where I'm not logged in. I'm on a VPS so I can install whatnot and make changes as needed.