Broken pager on /taxonomy/term/* pages

On taxonomy term pages pager displays more items than necessary.
E.g. If I set number of posts per page to 10 while total number of posts with the same given taxonomy term is 42, then /taxonomy/term/ will display pager with 9 pages (instead of just 5). Pages 6,7,8,9 will be blank.

I suspect that this might be caused by the fact that $pager_total[$element] returns wrong values on taxonomy pages:

function themename_pager($variables) {
  $element = $variables['element'];
  global $pager_page_array, $pager_total;

  $total_number_of_pages = $pager_total[$element];
  print_r($total_number_of_pages); // This will print strange value on taxonomy pages
}