Comment #1 on issue 621 by pekka.klarck: Only one line of documentation in keyword is printed to report
http://code.google.com/p/robotframework/issues/detail?id=621
Only the first line of the keyword doc is shown on the logs by design. Otherwise logs would grow really big if you have big documentation for keywords. This is at least mentioned in the User Guide, I'm not sure should it be more visible though:
http://robotframework.googlecode.com/svn/tags/robotframework-2.5.1/doc/userguide/RobotFrameworkUserGuide.html#documenting-libraries
