We've now enabled you, the adventurous user, to report issues directly into our development system. Head to the "Report a Problem" page to check it out.
The development tracker offers a much better way to tell us about problems as it automatically creates a tracked issue in our development system. You can also upload your logs, blend files and any other helpful information required to reproduce the problem as part of the report.
Use the "Report a Problem" page for both bugs, and ideas or suggestions for improvement or where you think there might be a missing feature or a badly designed feature (like one that creates more work/problems than it solves to use it :P).
We're still encouraging you to ask questions in this forum. For example, where you might want to clarify whether a problem you have is a problem with crowdrender, or with Blender or .... something else before you report your problem as a bug ;)