Cacheing not working

[eluser]dfreerksen[/eluser]
I'm playing with the new Cache drivers in Codeigniter and I'm having some troubles. I downloaded the latest code from Codeigniter Reactor. I am using the exact same sample cache code found in the User Guide at http://ellislab.com/codeigniter/user-gui...mple_usage

I have verified both APC is supported and my application/cache/ directory is writable. The problem is, it never caches. If i do var_dump($this->cache->get_metadata('foo')); it returns false. Meaning it used the dummy cache.

If I do something like this everything works just fine:

$this->load->driver('cache');
$driver = 'file';
if ($this->cache->apc->is_supported())
{
$driver = 'apc';
}
if ( ! $foo = $this->cache->{$driver}->get('foo'))
{
echo 'Saving to the cache!<br />';
$foo = 'foobarbaz!';
$this->cache->{$driver}->save('foo', $foo, 300);
}
var_dump($this->cache->get_metadata('foo'));

Am I missing something or doing something wrong? Is this a bug in the CI code? If this is a bug, does anyone have any idea how to fix this? I've been looking through the Cache code and haven't been able to find any issues yet.