Thanks for report. Looks like some kind of heavy-weight black magic.
Problems mentioned by Mathias were solved in mid July, it is not related
to the current troubles as those changes are completely same for rawhide
and F9. Actually everything is same, diff is showing the only difference
in requires for xml-common, release number, changelog changes and
switched position of CATALOG definition (just changing the position
didn't help). After usage of F-9 spec file (with devel changelog and
version) it seems to work properly again.It seems there is something
very fragile in docbook-dtds.spec and it was accidently broken.
http://koji.fedoraproject.org/koji/taskinfo?taskID=793167
should work for you. At least it works for me...