How do I get , in postcounts?

[Zzed]

In admin/functions.php:
Look for:

//highlight words for search engine

Add the following directly above it:

if($post[posts] >= 1000) {
  $left = floor($post[posts] / 1000);
  $right = $post[posts] % 1000;
  $post[posts] = "$left".","."$right";
}