No one is lucky enough to never have an issue with an application. So it's essential for a user to know where to ask for assistance, how to do this and what information should be provided to make the issue as clear as possible. That's what we'll discuss now.
Before asking a question it's always worth ensuring that no one has asked this question before and that the answer has not been given yet. Besides, of course, Google, you can search for similar issues on www.redmine.org using the search form http://www.redmine.org/search:
In most cases the answer, if it exists, gets found in Issues or Messages, the answer to a frequently asked question can be also found in Wiki pages.
If you can't find the answer using this search form the first thing to check is whether the issue is really related to Redmine. It just can be related to one of the plugins you are using. The easiest way to check this is to try disabling all plugins (or one-by-one to determine which one causes the issue)...