PHP Error Parse error: syntax error, unexpected T_ELSE

Well I don't know PHP from beef jerky but shouldn't this bracket

} echo (form action='changepass.php' etc.)

not be there?

Format your code a bit nicer and you'll probably see the problem:

<?php session_start();

$user = $_SESSION['username'];

if ($user) {
    if ($_POST['submit']) {
        $oldpassword = md5($_POST['oldpassword']);
        $newpassword = md5($_POST['newpassword']);
        $repeatnewpassword = md5($_POST['repeatnewpassword']);

        $connect = mysql_connect("*******","******","*****");
        mysql_select_db("zenonhos_lr");

        $queryget = mysql_query("SELECT `password` FROM `users` WHERE username='$user'") or die();
        $row = mysql_fetch_assoc($queryget);
        $oldpassworddb = $row['password'];

        if ($oldpassword==$oldpassworddb) {
            if ($newpassword == "") {
                echo "Password cannot be blank";
            } else {
                if ($newpassword==$repeatnewpassword) {
                    $querychange = mysql_query("UPDATE `users` SET password='$newpassword' WHERE username='$user'");

                    session_destroy();
                    die("Password successfully changed! <a href='index.php'>Return to home page</a>");
                } else {
                    die("New passwords do not match");
                } else {
                    die("Old password does not match");
                }
                echo "<form action='changepass.php' method='POST'>" .
                     "Old Password: <input type='password' name='oldpassword'><br>" .
                     "New Password: <input type='password' name='newpassword'><br>" .
                     "Repeat New Password: <input type='password' name='repeatnewpassword'><br>" .
                     "<input type='submit' name='submit' value='Change Password'>";
            } else {
                die("You must be logged in to view this page.");
            }
?>

FYI I cleaned up the last echo statement for clarity, it's not the direct issue.

See what you missed?