Report bugs in JIRA at http://jira.jboss.org/jira/secure/Dashboard.jspa. You should first post a query in the forums regarding any problems you find, and ask if you should open a JIRA issue. Also, make sure you one the JIRA in the correct project (hence the reason for posting on the forum first).
P.S. Use your forum id/password to log into JIRA.
Thanks, Peter. :) I see JIRA has a "Documentation" section too.