title: Memcached item deletion doesn't work
body: <p>I stumbled upon a weird behavior of Memcached server (version 1.4.5):
  I have a single server and I'm trying to delete a stored value and it doesn't work as the item remains there (and I don't receive any error).</p>
  
  <p>I wrote a quick PHP code that shows the problem:</p>
  
  <pre><code>$memcache_object = memcache_connect(MEMCACHED_SERVER_ADDRESS, MEMCACHED_SERVER_PORT);
  $key = '64b788714dx7cds5350101e37ec0ddd40253123d';
  
  $myObject = memcache_get($memcache_object, $key);
  echo count($myObject); // Prints 1000
  
  memcache_delete($memcache_object, $key);
  
  $myObjectSecondTry = memcache_get($memcache_object, $key);
  if (empty($myObjectSecondTry))
      echo 'Empty'; // It does print it's empty
  
  memcache_close($memcache_object);
  </code></pre>
  
  <p>Now if I run the code once it says "1000" and also it says that the object was empty on the second memcache_get() try.
  <strong>But</strong> if I click refresh and run it again then the $key still exists on the memcached server and I get the <strong>same</strong> output.</p>
  
  <p>I also tried to reconnect between each memcache call (i.e. get->delete->get) but it didn't help.</p>
  
  <p>The only thing that clears the memory is reseting the Memcached service.</p>
  
  <p>Please advise.</p>