Using the W3TC Development Version for WP 3.0.
I have the basic defaults set for Browser Cache settings, but when I check my site and look at the Firebug Page Speed test, I get the red exclamation mark next to "Leverage Browser Caching" and the message: "The following resources are missing a cache expiration. Resources that do not specify an expiration may not be cached by browsers. Specify an expiration at least one month in the future for resources that should be cached, and an expiration in the past for resources that should not be cached:"
Followed by a long list of jpg, css, js files.
There's also a whole section labeled: "The following resources are explicitly non-cacheable. Consider making them cacheable if possible:"
Followed by a bunch of png, css, js, etc. files.
Any suggestions on how to get Browser Caching to work?