Description:
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This version of php (5.3.1, threadsafe, vc6) fails to connect to MySQL server 5.1. Apache is also the latest version (2.2.14).

It hangs (stalls for more of a minute even with shorter scripts timeouts, no dr. watson notification) when using host = 'localhost' (pipes), seems to work with host = '127.0.0.1'. 

Fails with both 'mysql' and mysqli' libraries.

No bugs appear on any logs or on the page, it just hangs for a minute and closes the tread.

Reproduce code:
---------------
$link = MySQL_Connect('localhost', 'root', 'root') or die('cannot connect');
$result = MySQL_Query('show databases', $link) or die('cannot exec');

echo 'Connection ok';
while (false != ($row = MySQL_Fetch_Assoc($result)))
{
print_r($row);
}

Expected result:
----------------
It should eighter work or produce a error, not hang. Maybe a problem with the pipes? As a workaround, how can you force always a network connection?