After upgrading from JIRA 4.2 to 4.4, we've started seeing duplicate/identical e-mails be sent out for issue changes (comments, creating an issue, updating an issue, etc).
I can't see any obvious way to determine which events are triggering the e-mails, or if they're caused by users being listed as recipients multiple times (notifications are often sent to the 'developers' group, as well as the assignee, the reporter, and watchers).
Anyone have ideas for tracking this down, or what might otherwise be the cause?