I've seen another post with the same title, but there's no information publicly available there.
I'm having a similar problem.
I have a WP installation with W3TC working fine with Apache installation. The site has been migrated to another host running LiteSpeed (MediaLayer.com), and with this installation, if I enable CDN (I use Rackspace) I get a blank page on our site (not on dashboard). If I disable CDN, pages get back to normal.
Rackspace test upload is ok.