(Seems to be related to bug #8027.) After emerging kdevelop-2.1.3-r1.ebuild and working around bug #8375, some documentation files still cant be accessed since they are only readable by root. (e.g. kparts/index.html). quickfix: execute as root "find . -type f -exec chmod a+r {} \;" in the documentation root directory.
kdevelop-3.0_alpha2 is out, please test (kdelibs-documentation is now generated by app-doc/kdelibs-apidocs).
kdevelop-2.1.5 is in portage, it no longer provides docu (docu is provided by app-doc/kdelibs-apidocs). so this bug seems to me as a duplicate of #8027. please tell me if I'm wrong.
ok, kdevelop-2.1.5 is stable so this is fixed (cause permissions on kdelibs-apidocs are correct). If this still does not work for you, please reopen. Thanks.