Troubles building man pages

Hello:

I am having problem building the man pages for git v1.6.4.2. I am 
getting the follow stream of errors: (sorry for the long lines)

# make ASCIIDOC8=Yes man
GIT_VERSION = 1.6.4.2
make -C Documentation man
make[1]: Entering directory `/raida/packages/git/Documentation'
    GEN doc.dep
make[2]: Entering directory `/raida/packages/git'
make[2]: `GIT-VERSION-FILE' is up to date.
make[2]: Leaving directory `/raida/packages/git'
make[1]: Leaving directory `/raida/packages/git/Documentation'
make[1]: Entering directory `/raida/packages/git/Documentation'
make[2]: Entering directory `/raida/packages/git'
make[2]: `GIT-VERSION-FILE' is up to date.
make[2]: Leaving directory `/raida/packages/git'
    ASCIIDOC git-add.xml
    XMLTO git-add.1
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd
/raida/packages/git/Documentation/git-add.xml:2: warning: failed to load external entity "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
D DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
                                                                               ^
    ASCIIDOC git-am.xml
    XMLTO git-am.1
I/O error : Attempt to load network entity http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd
/raida/packages/git/Documentation/git-am.xml:2: warning: failed to load external entity "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"
D DocBook XML V4.2//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"

I have read through INSTALL and Documentation/README. I have tried to 
cover all dependencies, but I suspect that I'm missing something simple.

Note that 'git' itself compiles fine and I can build the HTML pages fine 
also. It seems to be the man pages that cause the problem.

Note that I am using openSUSE 11.1. I was able to build the man pages on 
my older openSUSE 11.0 machine, but not any longer.

I would appreciate any advice you are willing to share.

Thank you.

-- 
Brian Schang