This is actually a change to Crowd documentation but is triggered by changes in Confluence.

For the forthcoming 2.5.x release and for 2.6, the documentation for integrating with Crowd needs some small changes.
I guess this change should also apply to 1.0 Crowd documentation.

In the descriptions below I'm referring to the documentation at -
http://confluence.atlassian.com/display/CROWD/3.2.3+Integrating+Crowd+with+Atlassian+Confluence

Step 1 in section 2.1 asks you to copy jar files to .../WEB-INF/lib.
An additional jar is required if you are using Confluence 2.6 or Confluence 2.5.6 or later.
This jar is called crowd-integration-bamboo-1.1.1.jar and is available from the link -
http://confluence.atlassian.com/download/attachments/198785/crowd-integration-bamboo-1.1.1.jar?version=1

Step 1 in section 2.2 asks you to uncomment a repository setting. This should be changed to document adding a new entry of -

<crowd key="crowd" name="Crowd Repository"/> 

Just to re-iterate, this change is only applicable for Confluence 2.6 and 2.5.6. For older versions the instructions are unchanged.

(This was introduced by http://jira.atlassian.com/browse/USER-165 which now bundles atlassian-user-1.5 with Confluence 2.6 and Confluence 2.5.6.)