Subscriptions errors

Just thought I should paste that entire foreach loop:

    foreach ($defaults[$uid] as $key => $value) {
      if ($value < 0) {  // not set, use site dft
        $defaults[$uid][$key] = $defaults[-DRUPAL_AUTHENTICATED_RID][$key];
        $defaults[$uid]['uses_defaults'] = TRUE;
      }
    }

In order to help diagnose the problem, I have acquired and pasted the contents of $defaults

Array ( [-2] => Array ( 
[uid] => -2 
[digest] => 0 
[send_interval] => 1
[send_updates] => 1 
[send_comments] => 1 
[send_interval_visible] => 0 
[send_updates_visible] => 0 
[send_comments_visible] => 0 
[autosub_on_post] => 1 [
autosub_on_update] => 1 
[autosub_on_comment] => 1 
[send_self] => 0 ) ) 

Hope this helps. Any assitance much appreciated.

I am logged in as a normal user. The errors arise from merely visiting a page, although it does not occur on all pages. The function attempts to determine if the user has made a subscription choice, or else otherwise apply the default settings.

For reference I have pasted the entire code block for the this function. The relevant section is indicated, towards the bottom. Any help would be much appreciated!

Thanks,
Chris.

/**
 * Helper function to retrieve
 *   send_self/autosub_on_post/autosub_on_update/autosub_on_comment/    | 1, 0,
 *   digest/send_interval/send_updates/send_comments/                   | -1 = use default
 *   send_interval_visible/send_updates_visible/send_comments_visible/  | 1, 0, -1 = only preference, -2 = always use site default
 *   uses_defaults values;
 * $account can be NULL/0 (for site default), a user object, or a uid.
 */
function _subscriptions_get_setting($name, $account) {
  global $user;
  if (!isset($account) || empty($account->uid) || is_numeric($account) && $account <= 0 ) {
    $uid = -DRUPAL_AUTHENTICATED_RID;
    unset($account);
  }
  elseif (is_numeric($account)) {
    if ($account == $user->uid) {
      $account = $user;
      $uid = $user->uid;
    }
    else {
      $uid = $account;
      unset($account);
    }
  }
  if (is_object($account)) {
    $uid = $account->uid;
  }

  static $defaults = array();
  if (!isset($defaults[$uid][$name])) {
    $result = db_query("SELECT uid, digest, send_interval, send_updates, send_comments, send_interval_visible, send_updates_visible, send_comments_visible, autosub_on_post, autosub_on_update, autosub_on_comment, send_self FROM {subscriptions_user} WHERE uid in (%d, %d) ORDER BY uid", -DRUPAL_AUTHENTICATED_RID, $uid);
	
    while ($s = db_fetch_array($result)) {
      $defaults[$s['uid']] = $s;
    }
//THE ERRORS RELATE TO THE FOLLOWING FOREACH LOOP!
    foreach ($defaults[$uid] as $key => $value) {
      if ($value < 0) {  // not set, use site dft
        $defaults[$uid][$key] = $defaults[-DRUPAL_AUTHENTICATED_RID][$key];
        $defaults[$uid]['uses_defaults'] = TRUE;
      }
    }
    foreach (array('interval', 'updates', 'comments') as $parm ) {
      // Site overrides user values.
      if ($defaults[-DRUPAL_AUTHENTICATED_RID]['send_'. $parm .'_visible'] == -2) {
        $defaults[$uid]['send_'. $parm] = $defaults[-DRUPAL_AUTHENTICATED_RID]['send_'. $parm];
      }
    }
  }
  return $defaults[$uid][$name];
}

$name and $uid didn't have values, however $account did:

tdClass Object ( [uid] => 1000002 [name] => chrism2671 [pass] => df1c0bac4d4d33b360c187b63b1150b3 [mail] => hello@world.com [mode] => 0 [sort] => 0 [threshold] => 0 [theme] => [signature] => [created] => 1186994202 [access] => 1212302311 [login] => 1212232769 [status] => 1 [timezone] => 0 [language] => [picture] => [init] => [data] => a:6:{s:7:"contact";i:0;s:14:"picture_delete";s:0:"";s:14:"picture_upload";s:0:"";s:16:"privatemsg_allow";i:1;s:28:"privatemsg_setmessage_notify";i:1;s:20:"privatemsg_mailalert";s:1:"0";} [sid] => 82fdbf544f0d20e1108cf485258d7e0c [hostname] => 86.3.90.180 [timestamp] => 1212302311 [cache] => 0 [session] => [contact] => 0 [picture_delete] => [picture_upload] => [privatemsg_allow] => 1 [privatemsg_setmessage_notify] => 1 [privatemsg_mailalert] => 0 [roles] => Array ( [2] => authenticated user [1000002] => Registered Users [1000006] => Administrators ) )

(I stuck in a fake email for the sake of pasting).

I've managed to solve the problem. The issue was that the subscriptions_user table wasn't fully populated with all users. This (including the high uid numbers) was caused by the a data import from vbulletin (using the vb to drupal import module). By repopulating this table, all the errors disappeared!

Thanks for all your help!

Chris.