with old rhevm-doc installed:
2014-05-30 10:11:54,684 ERROR [org.ovirt.engine.core.utils.servlet.ServletUtils] (http--0.0.0.0-8080-3) Can't read file "/usr/share/doc/rhevm-doc/manual/en-US/html/Administration_Guide/Common_Content/css/lang.css" for request "/ovirt-engine/docs/manual/en-US/html/Administration_Guide/Common_Content/css/lang.css", will send a 404 error response.
with new fixed rhevm-doc installed, no more 404.