1. Or you use the id parameter for your sites navigation. In that case
    Easy fix: replace the $id variables in your page with $page, and change your links from ?id=... to ?page=... smile.gif
  2. Another thing that might be causing this: Another script is useing the $id variable. Especially polls oftenly use $id. The easiest solution is to switch to another script.

    A solution that might work
    CODE
    if( isset($_GET['subaction'] ) )
    $id= $_GET['id'];
    include(show_news.php);


    A little harder is to replace $id in all files of the script. You may replace all occurences of $id with $fixed_id or something. be sure to change all occurences of
    ['id']
    and
    ["id"]
    to
    ['fixed_id']
    ["fixed_id"]
    Note that you should ony do this for one script.
    If you still get the error, post it at the forums, be sure that you include the actual number and your site in the post.