I am using WordPress 2.8.6 and W3 Total Cache version 0.8.5. I added one stylesheet with full URI to the minify settings and saved, then cleared the cache. When I reloaded the home page of the site, it was apparent the stylesheet was missing. I checked the source of the page, and I saw this:
<link rel="stylesheet" type="text/css" href="http://www.example.com/wp-content/w3tc/min/default.include.css" media="all" />
<head> element, but when I try to access that page, I get a 500 server error.
If I look in the filesystem, that default.include.css file is not present. When I remove the stylesheet from the minify settings, the site goes back to normal.
It appears that W3 Total Cache is working perfectly for almost everything else on the site, but I cannot get this to work for the life of me. Any tips you can provide are appreciated.