It works fine for us to have you post issues here. If you want to actually submit changes to the repository we can do that as well (e-mail me).

We don't have a formal policy on who can submit bugs directly (we should). I think the basic expectation would be that if you submit bugs directly, you can also follow up and verify changes. This implies that you are enlisted in the live source tree and can build.

We are happy to have more contributors, so we can help get you set up with the live subversion sources.