The manpages directory is missing from the ebuild (checked 1.57.0 and 1.60.1).
The directory than contains the xsl files for manpages is not included in the ebuild.
Solution: Change the following line from:
for i in common extensions fo html htmlhelp images javahelp lib template xhtml
for i in common extensions fo html htmlhelp images javahelp lib manpages
the manpages directory contains only a small set of the documentation provided in xhtml/ and html/. is this likely to be expanded upon in future versions ? from the README it doesnt look finished at the moment.
*** Bug 20380 has been marked as a duplicate of this bug. ***
Sorry, thanks for your report but I'm going to leave these out for the moment, until they are more complete.