Email never send with Digests Activity log rules

Hi,
My rules are executed but never included in the email.
Using the contrib module instead of the version in Commons fixed the problem.

But to keep the drupal commons version, I found that's because they modified a condition in the file activity_log.rules.inc, function activity_log_log_action, before saving the activity. (sorry couldn't make a patch. My drush make didn't work). They added $event->tid in the condition and array $pairs.

if (!in_array("$event->tid $event->target_id $event->target_type $display_type $id $type $viewer", $pairs)) {
  $pairs[] = "$event->tid $event->target_id $event->target_type $display_type $id $type $viewer";

Now I still have a problem with my rules. In the db the value of display_type never change. It stays "web" instead of being "email". Any idea ? Changing the value directly in the db solve the problem.

Many thanks,

Luc