Hi,
After a simple upgrade from 3.2.* to 3.3.x-dev, the cache system does not work normally anymore.
After upgrade, with a empty cache, the first HTTP request create the cache directory correctly. But the second fail inexorably. Returning exactly this error

Compile Error: Cannot redeclare class Symfony\Bundle\SecurityBundle\Security\FirewallMap

I'm pretty sure this looks like to a case-sensitive problem, as my system run on windows with a Vagrant VM hosting debian 8. And this is a frequent problem with that configuration !

I'm not enough confortable with symfony intern mechanism to find the issue myself tough...