Hi,
I notice that Fedora 7.90 still has vorbis-tools-1.1.1.svn20070412-2. A newer version of svn would fix bug 244757[1]. Given that an svn version rather than an official release is being used anyway wouldn't testing be a good time to try to bump to a slightly newer revision that doesn't contain this disabling bug for oggdec?
[1] https://bugzilla.redhat.com/show_bug.cgi?id=244757