Documentation for Confluence 2.5.4 - 2.5.8.
Documentation for [Confluence Cloud] and the latest Confluence Server is available too. 
Often users may have problems with certain characters in a Confluence instance. Symptoms may include:
In most cases, it is due to a mis-configuration in one of the components that Confluence uses.
Follow these steps to diagnose the problem:
Confluence includes an encoding test that can reveal problems with your configuration.
To perform the test, view the /admin/encodingtest.action page on your Confluence instance. You will be required to copy and paste a line of text and submit a form. The test will take the text and pass it through Confluence, the application server and the database, and return the results.
Example:
http://confluence.atlassian.com/admin/encodingtest.action
If the text displayed in the encoding test is different to what was entered, then there are problems with your character encoding settings.
A successful test looks like the following:
MySQL 3.x
MySQL 3.x is known to have some problems with the upper- and lower-casing of some characters, and may fail the last two tests. For more information, see MySQL 3.x Character Encoding Problems.
As mentioned in the Configuring Encoding document, the same character encoding should be used across the database, application server and web application (Confluence).
If there are still problems with character encoding after following the above steps, create a support request, and our support staff will aid in solving your problem.
Entering in the following details will help us to identify your problem:
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