[Curzon564]

I also had the % problem. It seems that this happens always if your board uses . instead of , (e.g. 1.500 posts instead of 1,500 posts).

To fix this problem do the following:

Replace the original code with this modified version of buro9's Code:

// HACK : START : USER ACTIVENESS 
  $show[useractiveness] = 0 ; 
  if ($userinfo[posts]) { 
    $forumids = implode("', '", get_noaccess_forumids()); 
    $tfarray = $DB_site->query_first( 
     "SELECT COUNT(*) AS aposts," . TABLE_PREFIX . "forum.title AS aftitle, " . TABLE_PREFIX . "thread.forumid AS aforumid 
      FROM " . TABLE_PREFIX . "thread 
      LEFT JOIN " . TABLE_PREFIX . "post ON " . TABLE_PREFIX . "post.threadid = " . TABLE_PREFIX . "thread.threadid 
      LEFT JOIN " . TABLE_PREFIX . "forum ON " . TABLE_PREFIX . "forum.forumid = " . TABLE_PREFIX . "thread.forumid 
      LEFT JOIN " . TABLE_PREFIX . "deletionlog ON ( " . TABLE_PREFIX . "deletionlog.primaryid = " . TABLE_PREFIX . "thread.threadid AND type = 'thread' ) 
      WHERE " . TABLE_PREFIX . "forum.forumid NOT IN ( '$forumids' ) 
        AND " . TABLE_PREFIX . "thread.visible=1 
        AND " . TABLE_PREFIX . "deletionlog.primaryid IS NULL 
        AND " . TABLE_PREFIX . "post.userid = $userinfo[userid] 
      GROUP BY " . TABLE_PREFIX . "forum.forumid ORDER BY 1 DESC LIMIT 1"); 
    $_activeposts = $tfarray['aposts']; 
    $_activeurl = "<a href=\"forumdisplay.php?$session[sessionurl]f=".$tfarray['aforumid']."\">".$tfarray['aftitle']."</a>"; 
    $_activeperc = round(((implode('',explode('.',$_activeposts)) / implode('',explode('.',$userinfo['posts'])) ) * 100), 2)."%" ; 
    $show[useractiveness] = 1 ; 
  } 
// HACK : END : USER ACTIVENESS

The only thing replaced in this modified version are 2 . instead of , in the $_activeperc line.

As this isn't my code, credits belong to buro9 for his work.

@buro9
I hope you don't mind me modifying your code.