io pensavo il problema stesse negli array... posto il resto:

index.php
Codice PHP:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="keywords" content="<?php echo $PAROLECHIAVE; ?>" />
<meta name="description" content="<?php echo $DESCRIZIONE; ?>" />
<title><?php echo $TITOLO; ?></title>
<link href="stile.css" rel="stylesheet" type="text/css" />
</head>

<body>
<table width="100%">
  <tr>
    <td colspan="2" align="left" valign="top" class="titolo"><h1><?php echo $TITOLO; ?></h1></td>
  </tr>
  <tr>
    <td colspan="2" align="right" valign="top" class="menu-lingue">
    <?php
        foreach ($lingue as $k=>$v)
            {
                if ($k != $lingua)
                    {
                        ?>
                            [url="?lingua=<?php echo $k; ?>"][img]bandiere/<?php echo $flags[$k]; ?>.gif[/img]" title="<?php echo $v; ?>" border="0" />[/url]
                        <?php
                    }
            }
    ?>

    
    </td>
  </tr>
  <tr>
    <td width="200" align="left" valign="top"><ul>[*][url="index.php?lingua=<?php echo $lingua; ?>"]<?php echo $HOMEPAGE; ?>[/url][*][url="pag01.php?lingua=<?php echo $lingua; ?>"]<?php echo $LINK01; ?>[/url][*][url="pag02.php?lingua=<?php echo $lingua; ?>"]<?php echo $LINK02; ?>[/url][*][url="pag03.php?lingua=<?php echo $lingua; ?>"]<?php echo $LINK03; ?>[/url][*][url="pag04.php?lingua=<?php echo $lingua; ?>"]<?php echo $LINK04; ?>[/url][/list]</td>
    <td width="*" align="left" valign="top"><h2><?php echo $HP_titolo; ?></h2>
    <p align="justify">[img]img/468x60_<?php echo $lingua; ?>.gif[/img]" width="468" height="60" align="left" /><?php echo $HP_testo; ?></p>
    </td>
  </tr>
  <tr>
    <td colspan="2" align="center" valign="top"><?php echo $COPYRIGHT; ?></td>
  </tr>
</table>
</body>
</html>
poi gli altri non interferiscono sicuramente...si tratta delle altre pagine del sito.
Grazie cmq per la risposta! Gina