The Apache CloudStack project has mailing lists for users and developers. These are the official channels of communication for the project and are the best way to get answers about using and contributing to CloudStack. It's a good idea to subscribe to the cloudstack-users mailing list if you've deployed or are deploying CloudStack into production, and even for test deployments.

The CloudStack developer's mailing list (cloudstack-dev) is for discussions about CloudStack development, and is the best list for discussing possible bugs in CloudStack. Anyone contributing to CloudStack should be on this mailing list.

You can also report bugs in CloudStack using the Apache Defect Tracking System

To posts to the lists, you'll need to be subscribed. See the CloudStack Web site for instructions.