W3 version: 0.9.1.3
I've installed W3 on several sites but this is the 1st time I encountered this problem. This is also the 1st time I use the plugin on a blog installed in a directory.
When using Minify Disk based, it won't create the minified files.
The directory is created (dir/wp-content/w3tc/min/d045bf) including the file default.include.css.id with the ID inside, 552059464.
The site tries to load the files but it gets a 404 as the file ins't there, dir/wp-content/w3tc/min/d045bf/default.include.552059464.css