Using Project Level Security with Project Roles — This tutorial provides a step-by-step guide for creating project roles and using them in an issue security scheme. We recommend creating a test project and two test users for this tutorial.
Neat JIRA LDAP tricks — Gianugo has an interesting blog up about how to take the pain out of migrating users from LDAP http://www.rabellino.it/blog/?p=58
Letting customers only create issues — This page describes a minor JIRA modification which redirects users to an arbitrary page after creating issues (and potentially other operations). It is mainly of interest to JIRA Professional and Standard users.
Removing invalid characters from XML backups — In older versions of JIRA it was possible to cut & paste text containing control characters into JIRA issue fields. This causes problems, because JIRA's backup format is XML, and XML does not allow for the storage of most control characters .