Description:
------------
Using getStats() after a get() is anomalous. And no further set() or get() can be executed on same script.

Walking through these steps:
1.getStats()
2.get($key_name)
3.getStats()
4.getStats()
the 3rd return a pid of -1 while 1 and 4 are returning the valid connection

And this way
1.getStats()
2.get($key_name)
3.getStats()
4.get($different_key)
Makes get of step 4 return the content of step 2.

Test script:
---------------
// Creates new object
$Memcached = new Memcached('pepe');
$Memcached->setOption(Memcached::OPT_COMPRESSION, true);
$Memcached->setOption(Memcached::SERIALIZER_IGBINARY, true);
$Memcached->setOption(Memcached::OPT_BINARY_PROTOCOL, true);

// Connects to a pool of servers
$Memcached->addServer("127.0.0.1", "11211");
var_dump($Memcached->getStats());

$Memcached->set("Content 1", "This is content ONE");
var_dump($Memcached->getStats());

$Content = $Memcached->get("Content 1");
var_dump($Content);
var_dump($Memcached->getStats());

$Memcached->set("Content 2", "This is content TWO");
var_dump($Memcached->getStats());

$Content = $Memcached->get("Content 2");
var_dump($Content);
var_dump($Memcached->getStats());

Expected result:
----------------
It has to return always tha valid connection:
array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 26
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 27
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45196
      'bytes_written' => int 339517
      'version' => string '1.4.5' (length=5)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 27
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 28
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45280
      'bytes_written' => int 340972
      'version' => string '1.4.5' (length=5)

string 'This is content ONE' (length=19)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 26
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 27
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45196
      'bytes_written' => int 339517
      'version' => string '1.4.5' (length=5)


array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 26
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 27
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45196
      'bytes_written' => int 339517
      'version' => string '1.4.5' (length=5)


string 'This is content TWO' (length=19)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 26
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 27
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45196
      'bytes_written' => int 339517
      'version' => string '1.4.5' (length=5)



Actual result:
--------------
array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 26
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 27
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45196
      'bytes_written' => int 339517
      'version' => string '1.4.5' (length=5)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int 7008
      'uptime' => int 4200
      'threads' => int 4
      'time' => int 1372161606
      'pointer_size' => int 32
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 3999
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 18997
      'curr_items' => int 4
      'total_items' => int 27
      'limit_maxbytes' => int 16777216
      'curr_connections' => int 9
      'total_connections' => int 64
      'connection_structures' => int 10
      'bytes' => int 18692
      'cmd_get' => int 85
      'cmd_set' => int 28
      'get_hits' => int 54
      'get_misses' => int 31
      'evictions' => int 0
      'bytes_read' => int 45280
      'bytes_written' => int 340972
      'version' => string '1.4.5' (length=5)

string 'This is content ONE' (length=19)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int -1
      'uptime' => int 0
      'threads' => int 0
      'time' => int 0
      'pointer_size' => int 0
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 0
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 0
      'curr_items' => int 0
      'total_items' => int 0
      'limit_maxbytes' => int 0
      'curr_connections' => int 0
      'total_connections' => int 0
      'connection_structures' => int 0
      'bytes' => int 0
      'cmd_get' => int 0
      'cmd_set' => int 0
      'get_hits' => int 0
      'get_misses' => int 0
      'evictions' => int 0
      'bytes_read' => int 0
      'bytes_written' => int 0
      'version' => string '' (length=0)

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int -1
      'uptime' => int 0
      'threads' => int 0
      'time' => int 0
      'pointer_size' => int 0
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 0
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 0
      'curr_items' => int 0
      'total_items' => int 0
      'limit_maxbytes' => int 0
      'curr_connections' => int 0
      'total_connections' => int 0
      'connection_structures' => int 0
      'bytes' => int 0
      'cmd_get' => int 0
      'cmd_set' => int 0
      'get_hits' => int 0
      'get_misses' => int 0
      'evictions' => int 0
      'bytes_read' => int 0
      'bytes_written' => int 0
      'version' => string '' (length=0)

boolean false

array (size=1)
  '127.0.0.1:11211' => 
    array (size=24)
      'pid' => int -1
      'uptime' => int 0
      'threads' => int 0
      'time' => int 0
      'pointer_size' => int 0
      'rusage_user_seconds' => int 0
      'rusage_user_microseconds' => int 0
      'rusage_system_seconds' => int 0
      'rusage_system_microseconds' => int 0
      'curr_items' => int 0
      'total_items' => int 0
      'limit_maxbytes' => int 0
      'curr_connections' => int 0
      'total_connections' => int 0
      'connection_structures' => int 0
      'bytes' => int 0
      'cmd_get' => int 0
      'cmd_set' => int 0
      'get_hits' => int 0
      'get_misses' => int 0
      'evictions' => int 0
      'bytes_read' => int 0
      'bytes_written' => int 0
      'version' => string '' (length=0)