Started to get "Fatal error" since Upgrading my Drupal 6.x site - Any Ideas?

The following Members Profile script works well in both PHP4 and PHP5 with Drupal 6.5, but fails and causes the following error in PHP5 with Drupal version 6.6 through 6.17:

Fatal error: Cannot access empty property in /home/iamtotal/public_html/includes/common.inc(1699) : eval()'d code on line 28

Any ideas on how I can fix the following code to make it work now?

I am currently running Drupal 6.17.

Thanks in advance,

Sam308

Members Profile script:

<?php
// Displays a list of all users (all roles)

$header = array(
          array('data' => t('Username'), 'field' => 'u.name'),
          array('data' => t('Photo'), 'field' => 'u.picture'),
          array('data' => t('Accepting Donations')),
          array('data' => t('Gender')),
          array('data' => t('Age')),
          array('data' => t('Marital Status')),
          array('data' => t('Location')),
    //      array('data' => t('Zipcode')),
          array('data' => t('Profession')),
          array('data' => t('Education')),
          array('data' => t('Income Situation')),
          array('data' => t('Last access'), 'field' => 'u.access', 'sort' => 'desc')
);
$sql = 'SELECT u.uid, u.name, u.status, u.created, u.access, u.picture FROM {users} u WHERE (uid != 0 and uid != 1)';
$sql .= tablesort_sql($header);
$result = pager_query($sql, 20);

$status = array(t('blocked'), t('active'));
while ($account = db_fetch_object($result)) {
       $account = user_load(array('uid' => $account->uid));
       if($account->picture){$account->picture = '<a href="?q=user/'.$account->uid.'"><img src="'.$account->picture.'" height="50" width="50" border="1" alt=""></a>';}
         else{$account->picture = '<a href="?q=user/'.$account->uid.'"><img src="../assets/images/default-user-sm.gif" height="50" width="50" border="1" alt=""></a>';}
       if ($account->profile_accepting_donations_status == 1) { $account->profile_accepting_donations_status = "Yes"; } else { $account->profile_accepting_donations_status = "No"; }
       if ($account->profile_location == "" ||  $account->profile_location == "0") { $account->$profile_location = "---"; }
       if ($account->profile_education == "" ||  $account->profile_education == "0") { $account->$profile_education = "---"; }
       if ($account->profile_income == "" ||  $account->profile_income == "0") { $account->profile_income = "---"; }


$rows[] = array(theme('username', $account),
          $account->picture,
          $account->profile_accepting_donations_status,
          $account->profile_gender,
          $account->profile_age,
          $account->profile_marital_status,
          $account->profile_location,
  //        $account->profile_zipcode,
          $account->profile_profession,
          $account->profile_education,
          $account->profile_income,
          $account->access ? t('%time ago', array('%time' => format_interval(time() - $account->access))) : t('never')
          );
}

$output = theme('table', $header, $rows);
$output .= theme('pager', NULL, 20, 0);
print ($output);
?>