honestly, i can't figure out how to report a bug against confluence.
i visited jira.atlassian.com and select 'create', and the creation dialog contains this huge weird dialog with a button 'file new bug here' but that button just goes to the top of the support page, which doesn't actually have a 'report bug' option. so, heading back to the issue-creation screen and ignoring the weird dialog, i go ahead and fill out the details of the issue and click 'create', and only then am i notified that i don't have permission to assign tickets. (note: apparently i can Create bugs, i just can't Assign them. hmmm)
really it's pretty demoralizing considering this is what we're using for our own bug tracking.