[support] continuous trigger on comment being viewed by authenticated user

I recently upgraded my site to Drupal 6-6. I am seeing a strange behavior with triggers, for the event "Trigger: When a comment is being viewed by an authenticated user". I have created an e-mail action and assigned it to this trigger event.

Now I'm getting dozens of these events in a 24 hour period reporting myself as the %username, even when I have not been on the site in quite a long time. So it appears it's reporting events that do not happen.

Has anyone seen this? Is this /op error or a bug, or worse, someone else hijacking the site, etc?

Any ideas how to track it down?

Many thanks,

Chris