Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves. 

A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external 
resources such as databases, etc.

If possible, make the script source available online and provide
an URL to it here. Try to avoid embedding huge scripts into the report.

Here is an example of PHP code that gives currency exchange courses on a current date. Under Win32 it does not works. On the hosting it works...

<?php
function get_content() 
{ 
 // Making current date 
 $date = date("d/m/Y"); 
 // Making link
 $link = "http://www.cbr.ru/scripts/XML_daily.asp?date_req=$date"; 
 // Loading HTML-page
 $fd = fopen($link, "r"); 
 $text=""; 
 if (!$fd) echo "Requested page not found!"; 
 else 
  { 
  // Reading file to variable $text 
  while (!feof ($fd)) $text .= fgets($fd, 4096); 
  } 
  // Close file descriptor 
  fclose ($fd); 
  return $text; 
}

$content = get_content(); 
$pattern = "#<Valute ID=\"([^\"]+)[^>]+>[^>]+>([^<]+)[^>]+>[^>]+>[^>]+>[^>]+>[^>]+>[^>]+>([^<]+)[^>]+>[^>]+>([^<]+)#i"; 
preg_match_all($pattern, $content, $out, PREG_SET_ORDER); 
$dollar = ""; 
$euro = ""; 
foreach($out as $cur) 
  { 
    if($cur[2] == 840) $dollar = str_replace(",",".",$cur[4]); 
    if($cur[2] == 978) $euro   = str_replace(",",".",$cur[4]); 
  } 
$date = date("d.m.Y"); 
echo "Currency exchange courses on ".$date."<br>";
  echo "Dollar - ".$dollar."<br>"; 
  echo "Euro - ".$euro."<br>"; 
?>

Fixed in CVS long time ago.
You have to wait for the next 4.4 release or (which is highly recommended) upgrade to 5.1.