[JJR512]

Building on your modification, to solve any possible conflicts mentioned in your warning, could I just change this:

$post[posts]=number_format($post[posts]);

To this:

$postcomma[posts]=number_format($post[posts]);

And change $post[posts] in the postbit template (and where ever else it appears) to $postcomma[posts]? That way, $post[posts] itself would be unaffected, in case other hacks do use it.